If I meet someone and discover that they're an absolute, very earnest nationalist, it's unlikely that I'm going to get much closer to them. I don't understand them. It doesn't matter where they're from, I just don't get it. I'm a multi-national kind of guy.
There is a structural difference between the way that Europe views Israel, and America views Israel. The European view is informed by the importance of colonialism in Europe's past. So for Europeans we are like Belgiums in the Congo, or the French in Alger, or the British in India. Strange interlopers in somebody else's land. But in fact, we [Israeli] have been here for 4,000 years. This is our ancestral homeland.