Our (North American) tolerance for, and allowance for (letting them build mosques, etc.), the Muslim "faith" will be a factor in our eventual downfall as a "free" (term used lightly) continent.
While all religion and faith is ultimately harmful to the human race, the Muslim brand is particularly dangerous in the immediate sense.
I am in Canada and cringe at what's allowed to flourish.
And the experiment that is multiculturalism? Total and absolute failure.
We continually attempt to ignore and deny our animal nature to our own detriment.
That is all from me for now.