There are few, if any active Muslims willing to denounce the 9/11 attacks. On that day I pledged my life to doing what I could to exterminate all of those who took part in this attack, or gave their approval, even their silent approval. I still have a lot of murdering to do to accomplish this goal. If I ever finish I will get back to you.
I know a lot of Muslims, personally, who denounce the attacks. One of them is a guy who set me up with my wife for our first blind date. He knew I was Christian at that time, and hey I’m still alive. Why would he want us Christians to propagate, according to your logic?