While I also agree that religion is b.s., you have to understand that for thousands of years humans have looked to some greater power as an answer to so many of life's mysteries. Lots of people swear that they have felt the presence of a God, or some higher power, that prayers have been answered... I believe this to be nothing more than coincidence or a placebo, but people will believe what they want to believe. While I think there are a lot more agnostics today than in the past, and I think that religious position is growing, it will take some time before people move away from religion (in general). What I'm getting at in this rambling is that someone isn't insane because they believe in a God. I believe they are wrong, but it's not a change that will happen overnight after thousands of years of human history of looking to the heavens for answers. A bit of tolerance from everyone, regardless of their religious views, can go a long way.