IMHO Islam is much less a religion and is much more a political movement. These people are first wave invaders. They should be treated as such. Warning indeed.
They are conquerors...not of faith, but of a political system that dispises women, is intolerant of any other faith and rules by a total suppression of all freedoms.
Until all non-muslis get it right we're in a world of hurt.
Islam is not a religion.
Islam is not a 7th century group of savages.
Islam is not a culture.
Islam is not a system that controls the tiniest element of your personal life.
Islam is not a political system.
Islam is not a rapacious military system.
It is all of them. Simultaneously.
That's why treating them mindlessly as "simply" a religion is a fool's errand, paid for in blood.