If you don't want to live with Dutch culture, don't move to Holland. I can't think of anything more "rational" than that.
Advocacy of violence against groups or membership in groups who so advocate violence is narrowly tailored.
Anybody can say they are nonviolent. Yasser Arafat did it all the time (when speaking in English for Western audiences).
Pretending to be civilized when confronted with an image that hammers on one of the barbarians' hot buttons is more difficult.
So the definition of being "civilized" is that one has no moral objection to homosexual activity? You sound like the Boston Globe as that is certainly their attitude. All traditional Christian believers need to be exiled from Netherlands immediately if that were the case.