You weren't listening. They did. In fact, there were quite a few "moderate" Muslims who were killed in the WTC and the Pentagon.
Once they've condemned al-Qaeda, then what?
Their kids are already scared to death because people in pickups drive by school yards and call them "ragheads," and worse.
Talk to a few random Muslims you meet. You might be surprised how frightened some of these people are.
Of people like you.
I will, and I'll bet the majority will think 9/11 was a Jewish conspiracy.