While it's obvious that Europe is embracing its own fall, and is therefore getting no more than it deserves, by the point that happens, the Islamofascists will be the dominant power in the Middle East, Africa, Asia, and Europe. Not even the Americas will be compeltely safe, with Canada falling down the same decline.
I'd say that is a threat that needs to be countered before it comes to fruition.
Up to a certain point, I agree with you ... however, you cannot save someone (especially a "someone" that's as big as Europe) from themselves or the consequences of their actions.
Besides which, by the time that it does come to fruition, carpet-bombing might again be a viable option.