'Islam is in fact a religion that promotes peace and understanding among people of all faiths, and it strongly prohibits all forms of violence and aggression against all people regardless of their faith or race'. Read more here.
Here are a couple of examples of how some Moslems promote peace and harmony; by simply dealing with all those who would disagree.
Result? Nobody disagrees any more. Peace. Harmony.
Death Threats and intimidation:
And lots more.
I am not, of course, suggesting that all, even most, Moslems condone this behaviour. But they need to acknowledge that this strand exists among them and address it. Or are they afraid of their brothers in the faith, too? Or do they feel that it is disloyal to Islam to speak out, even if they are genuinely uncomfortable with the violence?