The one hope is that unproductive culture- and work-hostile parasitic immigrants become such a high tax burden on regular citizens that it leads to a revolt in those countries most likely to be Islamicized in Western Europe.
It’s only a small hope, though. Westerners with their suicidal empathy would not have the stomach for the rough task of forced remigration, and would not allow people who have the guts to make it happen actually undertake it. It’d be a terribly ugly and violent business — though necessary — to force millions into boats or planes and then deposit them in Morocco, Pakistan, or wherever they will not engage in gang rapes, assault, general mayhem and fraud against anyone we care about.
So Western Europe is doomed, and will fall.