Forget Wester Europe, they're gone. Yesterday's news. In twenty or thirty years the White Europeans will be immigrating to Canada and the US if they can get in. Perhaps it would help them to learn Spanish and dress like Mexican aliens.
I think your point of view is unduly pessimistic, and not based on what is really going on in Europe. The Muslim immigrants dominate the slums. Leftist politicians see votes in them and pander to them. However, they are not all of Europe. There is a conservative movement, led in many countries by the Catholic Church, that serves as a check to this demographic nonsense.
Furthermore, there are a assimilated immigrants who don't play this Follow the Imam game, though they don't get attention. Given enough time and provocation, you'll see a counter-reaction from someone that Europeans respect and this will end.