Not all Muslims are anti-semitic, at least not openly. There are two Moroccan families living in this small block of flats, both ostensibly Muslim and quite user friendly.Well the problem you there is that the Germans have not been able to instill in the Muslims that having German pretentions means not being nasty to the Jews. Hands up those who consider that a possibility.
Newly arrived refugees are instructed in the ways of western life, including the right to religious freedom, whether the message sinks in is another matter. What doesn't help are extremists who do their worst to cultivate a climate of intolerance and extremism, eg Anus Amri who was the driver of the bus that rammed a crowd in a Berlin Christmas market.