I think that you will find that is down to the media not normal people. Mostly us common people wouldn't give a **** about a joke in bad taste but this is not just a joke in bad taste she is actually calling people out on throwing milkshakes instead of acid.
If anyone should get a grip on what is a joke and what is incitement I suggest that its you who need a reality check.
I suppose you would be ok with it if the subject matter had been a gay person and she said why throw milkshakes when you could give them a good old gay bashing instead then try to back it up as just a ****ing joke get real people.