Some things are too much for people to believe, too complex, too chaotic. And people love order. It is a center for all we do wrong. It gives us an answer. We like answers.
Religion makes people feel safer.
I find religion a very intersting subject. If I was born into a Hindu society, I would probably worship their god. If I was a Jew, I would not celebrate Christmas. So, all of these religions think that they have the right answers and everyone else has the wrong answer. I mean, God is unlikely human anyway.