when they have increased their population sufficiently to gain political influence.
they're busy at it
So, just to follow through on your argument here....
1) All Muslims agree on everything.
2) They are biding their time living our lifestyle for generations so that when they are able, their time will come and they will impose a radical Muslim viewpoint.
3) This time will come at some unknown point in the future.
Forgive me if I think this sounds absurd.