I think you are missing the point that others are making.
I am a "recovering Christian" slowly working through the BS that I was brainwashed with as a kid. I have no problem with believers believeing what they want - in their own space on their on dime.
What really gets me are:
1) Bible thumping, idiots who shove their beliefs in your face, whether by knocking on the door of your home, erecitng stupid and offensive signs, or irritating the crap out of me over a megaphone, while I'm waiting to enter a music venue.
2) Any aspect of "the man in the sky" entering the realm of public policy, whether its gay rights, abortion rights, the right to have multiple wives yada yada yada.
Given the horrors of persicution that non-belivers have suffered for 1,000's of years at the hands of the "TRUE BELIEVERS"

I think believers should cut us some slack when we poke fun.