It's called infiltration. It happened while the rest of us weren't even aware that it was happening (which means they had a plan). Muslims are now in every country in the world. How do you fight the enemy when he is everywhere and in all countries? The thing to do would be to stop it NOW. Deport all Muslims from all countries. That's the only sane thing to do. But, of course, we won't. No country will. And so, the future looks pretty bleak.
I suspected that, there will be no quick fix or final victory and a long bloody war is assured along with the probability of escalation.