We live in a world of diverse beliefs.
Naturally all people should believe in God because we are all created by God.
But some religions and circumstances do not allow some people to believe in God.
The environment has influenced a lot of people negatively.
Humans are created by God. We did not just come into existence by ourselves We are higher than animals based on our understanding. So,we must believe in God because we were created by Him. For the set of people who do not believe in God,the book of Psalms chapter 53 verse 1 says
, The fool hath said in his heart, There is no God. Corrupt are they, and have done abominable iniquity. There is none that doeth good.
According to the scriptures those who are called by God as fools are the ones who do not believe in God. For they are people without understanding.