As is a focus upon Christianity, Judaism, Jainism, hinduism etc etc
All these faiths are absolute nonsense that serve to divide the class and spread bigotry and hatred.
Islam is a religion followed by people of many ethnic backgrounds it is NOT racist to criticise or attack Islam or to challenge and attack the ideology of Muslims. Same as it is not wrong to do the same to Christians, Jews, Hindus etc..
The reason that the subject of Islam comes up so often is both the topicality of it at the moment, where the state and press are indeed trying to racialise Islam as something wholly Arabic. Plus we have certain portions of the left, followers of the Tony Cliff I'm looking at you now, cosying up to reactionary Muslim group like the Muslim Association of Britain.
Were these sections of the left cosying up to pro-zionist organisations then we would probably be accused of being anti-semitic for challenging this.