Your "joke" was meant to be offensive to Islam faith, it was not just about suicide bombers. Offering prayers doesn't insult any religion or actually even reference any particular religion. If you're unsure if a topic will violate a rule you can either 1) e-mail Skuzzy and ask or better yet 2) just don't post it, if it's in the O' Club it's probably not that important anyway.
Edit: For the record, I think all religions are fair games for jokes, I'm not offended by jokes that target a single religion. Obviously the BBS is not the place for that though. I didn't think the joke was that good anyway, personal preference.