This, as Karen points out, is anti-semitism:
Criticising a system of ideas (which is what Karen did) is not the same as abusing people. As we know, Islam is not a race. It is a set of ideas.
We should all be allowed to freely criticise ideas. In doing so we sometimes help the people that formerly believed those ideas.
Criticising homophobia, for example, might offend a lot of homophobes. But I’d say it’s the right thing to do - ultimately for the sake of both us, and homophobes themselves.