I don't know how hard it is to understand that EU is not a singular cultural entity in the same way that USA or Russia are. We don't have any real camaraderie, or even very much connection to what happens beyond our own nations borders, despite being superficially all part of the same pseudo-federation. Most of the Europeans don't understand the language of their neighbouring countries, and due to this, can't even reliably follow what happens in those neighbouring countries. Also, while anti-immigration sentiment has been growing steadily in the past ten years or so, most of the people will not change their voting patterns just because some muslims go on a rampage, mainly because they loathe and distrust the anti-immigration politicians even more than they hate the situation that is brewing up. And I can understand them; I didn't start to vote anti-immigrants of my country even though my city had a terrorist attack some years ago, simply because I will not be intimidated to give power to people who are objectively idiots and who, apart from anti-immigration push for politics that are stupid, conservative and fucking backwards.
In short, since most European voters on ideological grounds oppose bringing back some outdated christian moral conservatism and right-wing identity politics, very little will change in the near future. If anti-immigration parties would wisen up and keep their anti-immigrant stance but drop all the conservative, anti-gay, anti-EU and especially pro-religious moral ideas, they might get to power and things might change. Since anti-immigration stance is heavily married to all that shite, most voters will not even consider them as an option, as even though there are real problems with the muslim immigration, those opposing it come with a package that is a no-sell.