Only a problem because the west is ALLOWING them to be a problem. Want to shut it down? All you have to do is seal off the "Muslim sections" of any city with the military and the police,then shut off the water,the electricity,and the food deliveries.
Then handcuff every one of them that tries to leave,and fill the holds of freighters with them. Take them to the shores of Islamic countries,and put them in rubber boats with paddles.
Shoot to death any that try to resist.
Finally,shut off ALL aid to Muslim nations. Let them sink or swim on their own,and kill off the leadership and their families of any Muslim nation that attacks you.
They want to live in the Stone Age,so I say "Let's put them there".
BTW,send off any US citizen that protests this and defends them,with them on the boats. The Muslims would probably appreciate owning a few more slaves. Good for Islam,good for the west. Win/win.