Without Leftist enablers, apologists, facilitators, appeasers, and allies, Islam's real threat to the West is almost negligible. Sure, terrorism always poses a potential threat. But the real threat isn't any individual act of terrorism, but the manner in which it turns Leftists into Islamic allies against their own cultures, countries, and societies, and the manner in which that Leftist alliance enables acts of Islamic terrorism.
Just imagine how impotent Islam would be if the men of the West presented a unified front, with no Leftist cancer eating away at the heart of our nations.