Actually, I think, to be fair, there tends to be a difference between religious and atheistic bumper stickers. Those religious are usually in the "Hurrah for Jesus" mold, whereas those atheistic tend to be along the lines of "Ditch Religion and Grow Up." I think it is accurate to say that the atheistic ones are more designed to irritate and provoke.
> I think it is accurate to say that the atheistic ones ...
... have a sense of humor. There are some nasty ones, of course, but that's true for both sides. ON the atheist side, you *never* see any that basically boil down to "If you don't believe waht I believe, then you're not a *real* American."
That type of bumber sticker says more about the fact that the car owner is a jerk than it does about his religious beliefs.