The Flemish-language newspaper De Morgen (link only in Flemish) has a major article about a survey of Muslim students in Brussels high schools. The professor who conducted the survey concludes that half "can be described as antisemitic which is a very high rate." Five times higher, in fact, then among Flemish-speaking Belgians, who historically have been relatively anti-Jewish.
Incidentally, what was being measured here was not antagonism toward Israel but traditional anti-Jewish stereotypes. No doubt, the former attitude is even stronger.
The anti-Jewish sentiments among Muslims don't vary depending on education level or living standards. Obviously, they aren't getting it from Belgian society.