Alot of humour is based on being offensive. It is there to jolt the ignorant, the bigot and also the sterile easily offended head up your arse types.
The comedians like Chris Rock talk about racism and other sensitive subjects in a very clever and astute way. Of course nobody would call him a racist, because he is black!
The joke is very tame, not particularly funny and anybody that feels the need they "has to respond to shit like this in a strong way" needs to take a good look at themselves. Chill out you boring twat. It's no different to the jokes about paedo catholics. Intelligent people can differentiate between the joke and the reality
Personally, I think offensive jokes are only acceptable if the humour outweighs the offence. So for subjects extremely likely to cause offence, the joke has to be VERY f**king funny for it to be acceptable. I don't have any problem at all with genuinely funny jokes. Including racist, sexist and paedo priest ones.
But even then, there's context. I'd tell race jokes to non-white friends, cause they know me and they know I don't actually mean it as some sly piece of nastiness. I wouldn't tell the same jokes to people I didn't know, as I wouldn't want to come across as an asshole.
I worked for years as the only female at a big transport company, and I got sick to f**king death of sneaky insults, sly digs and not-so-subtle attempts to belittle and undermine me disguised as 'jokes'. Some people are very good at disguising bullying as 'humour' and are very quick to pull the 'Whoa, I was only joking, what's the matter, can't you take a joke....' any time they're actually called out on their nastiness.