And it has for quite awhile. In the late 1400's Islam was knocking-on-the-door of Paris. The French finally decided enough was enough, and drove them out. Now, they're back.
You would literally have to turn the entire ME to glass to solve this problem.
If that's what it takes ...
Yup!
The solution in my mind is one that would just never be accepted by anyone. Revert to a non-multicultural society, identify as explicitly Christian. Because the vacuum created by secularism has allowed a 5th column to grow in western countries.