Theres much in the media about anti Semitism. Not something I advocate or tolerate but if you replace Islam with similar commentary on Judaism there would be an uproar largely due to history. Dont forget thats what the Nazis did in the 30s to reinforce racial stereotypes and create a head of steam.
However Islam bashing seems to be acceptable following actions of a few rogue elements.

Both religions/cultures are minorities in the UK and Europe therefore such cartoons are not appropriate for that reason alone. There is satirical comment then there are rather less appropriate images being circulated. Its rather different in my view to satirise ' majority ' religions- not morally right but less likely to result in mass attack.

Christianity including Catholicism are wealthy and powerful institutions in the UK. Islam and Judaism are not

Cross refer to the Tariq Ali quote I posted previously.

Je suis moi.