If unchecked - it will be a mere matter of time before any type of negative comment about islam will bring riots to the streets.
Soon enough these muslims will then be living in a muslim country!
But that is not how Muslims think. They demand nothing less than a world-wide caliphate. They think they have an inherent right to rule over every single country. They do not see themselves as "guests," they see themselves as eventual rulers.
my personal arsenal says the towl heads will have trouble succeding in my area.