Or no Jews who eat shellfish. Or no Hindus who eat beef. Or no Buddhists who don't meditate.
It's pretty freakin' stupid.
And -- I've said this before but it bears repeating -- making ISIL's actions about Islam as a whole is pretty insulting to Muslims in general, and especially insulting to most of the people who are actually in combat against ISIL. Most of those people are, of course, Muslims.
Bill Maher asks, "Why do they hate us?" without bothering to be specific about who "they" and "we" are. Lots of people are always trying to tell Bill why some Muslims hate some Christians, but Bill's not listening. If it's not about Islam as a whole, then to Bill, we're naive liberals.
What do I, an autistic American atheist raised in a Protestant Christian family, have in common with the vast majority of those of the world's Muslims who know who Maher is? I've never opposed the fight against ISIL in any way, and Bill Maher frequently pisses me off.