People generally want to make themselves feel significant, and by believing there is a god, it is much easier to say that our lives have meaning. Although having faith may bring peace to personal lives, it brings along with it severe problems such as segregation. The way we define culture is based on religion(vice-versa) and without religion the world would undergo far less human-led catastrophes(Hitler?)

The fact that you are so quick to say that God exists without a doubt and then criticizing people of being ignorant of history(read some darwin) is quite ironic.