I'm an athiest but I don't think religious people are stupid or crazy.

More mistaken or mislead. . . and really as long as their religion doesn't hurt me or anyone else it's none of my business.

However I think that blowing yourself up in the name of anything at all is both crazy and stupid. (lets face it that's one attack on whatever it is your against, whereas if you blow something else up you can do more than one attack)

In the case of muslim suicide bombers they justify it through and because of religion. . . but I'd think they were just as crazy if they were blowing themselves up for anything else.