If only it was the Muslims...
There are plenty of other communities that don`t assimilate.
Natives and everything that makes Europe what it has been and currently (for now) is being replaced and that will only accelerate.
Those Africans coming in? They`ll care about their traditions and their ways of life and how to preserve those. Vast majority of them are Afro-centrists.
You see that in Academia and media.
Those migrants from Asia?
Same story.
That is how cultures die. They simply become irrelevant as the bearers of those traditions are, quite literally, dying out.
It was only recently that the entire of Baltic-Livonian tree became extinct. As similiar as it was to the rest of the region, it was still alien and foreign to locals and no one bothered to take it up and pass it on. Influx of new peoples didn`t help either.
Paris already looks like the Bangladesh. Smells like it as well.