I think we're differing on the nuances of definitions, which is inevitable without interminable discussion (and possibly even then as you and I speak differing Englishes).

I was originally, in this specific context, intending a meaning of full religious assimilation into (a subset of western) Christianity, i.e. conversion, by the "assimilation" in "My instinct is that Jews and Muslims are specifically targetted because they've proved especially resistant to Christian assimilation in western cultures."

I also posted a variation upthread saying: in this context the people who're being targetted are successful non-assimilationists, whether "racial" assimilation into whiteness or religious assimilation into one particular brand of western Christianity." Because elusis asked for an alternative word for "Islamophobia" and I think one can't find useful words without examining what one is attempting to communicate, in this example bigotry against people living within a competing/alternative/[better near-synonymous word] religion.