Why Do Religions Believe In God?

God is entirely pure without even the smallest tint of wrong in His nature. Holy God is the architect of honesty, patience, purity, holiness, love and much, much more than that. And that is the way He created our planet.

Can Someone Believe In God But Not Be Saved?

God's standards for us are a reflection of who He is, not just to make things more difficult. He is permanently restricted to his current state of being and doing. God's actions reflect His fundamental nature.
It's like the laws that govern the universe and can't be altered.
The God of the Bible created both the vast universe and the microscopic world we cannot see. Seek the truth in the Bible about this:

"I am the LORD; that is my name! I will not yield my glory to another or my praise to idols. (Isaiah 42:8)
For the LORD your God is a consuming fire, a jealous God. (Deuteronomy 4:24)
The LORD is exalted over all the nations, his glory above the heavens. (Psalm 113:4)
Yours, LORD, is the greatness and the power and the glory and the majesty and the splendor, for everything in heaven and earth is yours. Yours, LORD, is the kingdom; you are exalted as head over all. (1 Chronicles 29:11)
All the angels were standing around the throne...They fell down on their faces before the throne and worshiped God, (Revelation 7:11)

Most people today are only familiar with God in theory, they haven't encountered Him in reality.

God is the ruler of everything, including us, and He wants what rightfully belongs to Him. He commands us to love Him and show it by serving Him.
It's not easy to accept, but God has ultimate authority over the world, like a toy that He can play with. We would be in charge of setting the rules if we made it. God, on the other hand, says:

'Love the LORD your God with all your heart and with all your soul and with all your strength.
These commandments that I give you today are to be on your hearts.' (Deuteronomy 6:5-6)

God could have made life easier by taking away danger, but then we'd all be robots. But, that is certainly not what God wanted. He wanted creatures that could willingly and freely love Him.
Someone who resembled Him in some ways.

Letting people choose for themselves means they could say no to you and that's dangerous.

If you allow someone to make their own decisions, they might go against your authority, which is what we did.
It's an issue because we all have things that we do or think that the Bible considers to be sinful. When we do these things, it's a total disregard for God's nature and holiness, and it's like breaking the laws of the universe that He set in motion. These negative actions have put a barrier between us and God.

'The heart is deceitful above all things and beyond cure. Who can understand it?'(Jeremiah 17:9)
'But who can discern their own errors? Forgive my hidden faults.' (Psalm 19:12)

Keep in mind that every wrong action you take creates a responsibility towards God that must be fulfilled.

What we must repay to God:
'And forgive us our debts, as we forgive our debtors.' (Matthew 6:12)

God's perfect purity is being compromised by all of these things. Can you see it?
Have you ever taken something that wasn't yours to take? According to the Bible, God is against stealing.
Scripture reminds us not to covet what belongs to others. Have you ever grappled with envy over your friend's wife, life, possessions, or home?
God commands that we honor our parents. Did you ever disrespect your parents by answering back?
Using God's Name flippantly or in vain is against His commandments. Have you ever spoken God's Name carelessly or without due respect?

No secret is safe from God, He knows everything. Remember, we saw that ALL the wrongs must be put right. There will be a time when we must answer for every bad thing. Or, you could describe it as being in sync with the unchanging laws of the universe. The Bible puts it as mitigating God's anger. It's a surprise to many because they've been taught that God's love is unconditional for all. People have started to believe that God can never get angry with anyone, no matter what they do. It's common for people who don't understand the basics to argue that God is supposed to love us unconditionally.
We can't just focus on God's love for the world, we also need to acknowledge His holiness. It is impossible.

It's unachievable to fathom the eternal nature of God by applying our expectations, conduct, and earthly standards.
He's from a place that's completely out of reach, but the Bible tells us about Him. Expecting God to follow our rules is a waste of time because that's not how things work in the real world.

People often point fingers at God for the bad things that happen, but it's not fair to blame Him. His creation was flawless. Adam made a mistake and now we're all flawed.

The Bible says:

'For all have sinned (done wrongs things), and do need the glory of God. wrongs' (Romans 3:23)

Just being good and doing good things won't save you from the punishment for bad thoughts and actions. Only Jesus Christ can save you. Going to church and being kind doesn't mean you'll go to heaven. We must fully admit our wrong stuff and tell God we really are sorry, and really mean it. We need to commit our entire lives to God after asking for forgiveness.
Again, the Bible teaches us that the result of our bad choices is facing eternal punishment in hell:

'For the wages of sin is death, but the gift of God is eternal life in Christ Jesus our Lord.' (Romans 6:23)

God Gives You A Chance To Be Forgiven

No need to worry, God has a solution for all the bad stuff we do that makes it right with His unchanging laws of the universe.
Through Jesus Christ's death, burial, and resurrection, God fulfilled His glorious plan. This incredible plan was enacted in front of everyone, including humans, angels, and Satan. We can't fix our wrongs with anything else.

Are you wondering "Why is God so strict? Didn't they say He was loving?" God is characterized by love., but, according to the Bible, God's love and justice go hand in hand. They're two sides of the same coin.
We can't rely on our own thoughts to grasp God's ways. It's not right to expect God to obey our rules because it leads to a wrong understanding of Him. God knows everything you think, so you can't hide from Him or trick Him.

Fully Surrender to God After Apologizing

If you're truly remorseful for your actions, you'll want to dedicate your life to God. God directs us to do this. It's like giving God the ultimate power in our lives for the duration. We strive to follow every rule in the Bible.
The right way to do things is what the Bible says:

'Then he said to them all: "Whoever wants to be my disciple must deny themselves and take up their cross daily and follow me.' (Luke 9:23)

At no moment did God say this; 'To get to heaven and be with me, be a good person and do good for others.'
This is what the Most High God said about getting forgiveness for your sins:

'To some who were confident of their own righteousness and looked down on everyone else, Jesus told this parable:

"Two men went up to the temple to pray, one a Pharisee and the other a tax collector. The Pharisee stood by himself and prayed:'God, I thank you that I am not like other people--robbers, evildoers, adulterers--or even like this tax collector. I fast twice a week and give a tenth of all I get.'
"But the tax collector stood at a distance. He would not even look up to heaven, but beat his breast and said,'God, have mercy on me, a sinner.'
"I tell you that this man, rather than the other, went home justified before God. For all those who exalt themselves will be humbled, and those who humble themselves will be exalted." (Luke 18:9-14)

In the story, the religious man avoided "bad" sins like arson, but he was not forgiven by God.
While the cheating tax collector did do ‘bad' sins but was forgiven by God, because he truly repented of his ways and was so sorry over what he had done. Confessing our wrongdoings and giving ourselves to God is an uncomfortable experience. In spite of that, we need to admit our mistakes and give up control to God to be saved.

Jesus Christ shared:

'He called a little child to him, and placed the child among them.
'And said, “Truly I say to you, unless you change and become like children, you will not enter the kingdom of heaven.' (Matthew 18:2-3)

Mere acts of kindness for God won't secure our salvation; salvation from hell doesn't come from being virtuous.

'You were saved by faith in God, who treats us much better than we deserve. This is God's gift to you, and not anything you have done on your own.' (Ephesians 2:8)

Do You Want To Be Held Accountable For Your Sins And Suffer In Hell Forever?

'Then he said to them all: "Whoever wants to be my disciple must deny themselves and take up their cross daily and follow me.' (Luke 9:23)

To follow Jesus, we must be willing to give up our own desires every day and live for Him.

The Scriptures teach us that:

'Therefore, I urge you, brothers and sisters, in view of God's mercy, to offer your bodies as a living sacrifice, holy and pleasing to God--this is your true and proper worship. (Romans 12:1)

'But in your hearts revere Christ as Lord. Always be prepared to give an answer to everyone who asks you to give the reason for the hope that you have. But do this with gentleness and respect.' (1Peter 3:15)

To recap:

You see the depth of your flaws and sins before God. You truly apologize for your offense. Jesus Christ becomes your teacher. This is a lifelong commitment. Living for God is our priority, as the Bible commands. Read the Bible every day to strengthen your relationship with God. Dedicate time each day for prayer to God. Letting others know about the hope we have in Christ. Following God's guidance to serve others. You devote your life to the cause of God Most High forevermore.
God our Father will bring us to heaven.

You can read a Bible here, start with the book of Mark: https:/bit.ly/3j1cmbe or https://www.sermoncentral.com/bible/new-living-translation-nlt/mark-1?passage=Mark+1