Nobody cared when Bill Maher (and Sam Harris) spent the last 15 years tearing christianity apart, but apparantly critizing a religion even more deserving of scrutiny and it's diehard adherents makes them the worst people in the world. They're simply concerned and they have a right to be concerned. Even more importantly, if you refuse to listen and denounce them as bigots, it only further empowers the truly bad people on the far right because like it or not, the islamic fundamentalist issue isn't going away and if sane, reasonable people on the left aren't allowed to dicuss it, the people will go (and have gone) to the only people who will and that's the real concern