What Makes Other Humans Think/believe That There Is No God?

A total disbelief in him.

Stupidity...oh, excuse me, I meant to say uninformed uneducated decisions!!

Intelligence, education, and reading the Bible should convince any reasonable person that there is no God. Furthermore, if the petty, jealous, genocidal God of the Bible really did exist, why the heck would anyone want to worship such an evil creature?

Secular teaching,ignorance,history of different cultures,and as the bible says your either on the Lord's side or against him you can't sit on the fence waiting to choose a side.and as the bible/God also says they will be blinded to the truth until they accept Jesus as lord and saviour.which means to me that they can not see what is right in front of them as the truth(as Jesus said forgive them father for they do not know what they are doing even as they took his life).sort of like the rich man when he asked what do i have to do in order to be saved to follow you when talking to Jesus.once he heard the answer he did not like it.in other words he wanted God to be his idea of what  god should be instead of what God /Jesus told him was needed. In other words man can not serve 2 gods.in other words they don't want to believe at one point in the future of their lives they will be judged and found lacking if they are not forgiven under the rule/law of the one God of israel/Jesus the christ.just as the religious leaders of Jesus' time had him crucified for how to say interfering in their idea of how the church should be ran and how the teachings should be interpreted to benefit them.this is the way some people on earth think God should act according to their rules and laws not God's.in other words they want God to take orders from them and be what they say while living in sin.they forget God is the creator and not the other way around. For some reason they think giving up your life to one that created it means that you will have no life. It's funny how man keeps making this mistake of thinking they can decide whether or not heaven and hell exists and that they will not be judged by the creator.like because they deny deny deny it will mysteriously not be so in the end.

That there is no reason to believe in such a being.

I know that there are people who don't believe what is in the bible but I do here is a Scripture that I hope answers your question se coned Corinthians 4-3-4 And even if our gospel is veiled it is veiled to those who are perishing. Vers4 In whose case the god this world has blinded the minds of the unbelieving that they might not see the light of the gospel of the glory of Christ who is the image of GOD I hope this helped