I think the important thing to remember is all behaviours are merely symptoms of our environment, and there's no such thing as biology. What was social engineered into them can be socially engineered out of them and progressivism will see to that for us; get it?
That's how life works, people respond to technocratic intervention by anti-liberal elitists, and their 'guidance', to learn how to live as they're supposed to live - the 'progressive' way. There is such a thing as 'liberal Islam', and it will be a positive, life-affirming force in the west. What's more, I don't think we should stop at 20,000 refugees, I think we should import at least 5 million Islamic single males to test our 'progressive' credentials.
It's also worth remembering that anyone who isn't a white man is a natural ally of the feminist; the 'white man' is the 'new bourgeoisie' and anything other than a 'white male' majority is obviously worth having. So when it all goes to **** who really cares? At least we'll have got rid of the evil white males.