You just need to see Borat to figure out that many people in the States think this way too.
The difference is that the people in the U.S. that think that way ARE skinheads, militia types, the fringes of society, etc etc. Europe is hit on two fronts: the culture of anti-semetism that exists amongst university professors, journalists, and intellectuals, and the Muslim community, who have an inordinate amount of influence and power. It allows anti-semetic ideas to seep into the wider culture.
Question 8 is the one that shocked me, but gave me hope in a slight way. It shows that people really don't know how hellish life is for most Continental European Jews, which I suppose is better than knowing and not doing anything about it.