Personally, I don't think the holocaust will ever be a laughing matter and should forever remain taboo. And if that means fuck free speech? Then, yeah, why not. Maybe what he did was one of those fucking annoying social experiments? He sought attention with something so crass and got it. He'll no doubt get a book deal after it, eh?
Won't repeat myself any more after I've discussed it in the following thread which you may find interesting:
RE: ATTENTION BRITS - Fight for FREE SPEECH on the 23rd of April 2018 (THIS MONDAY) in LONDON and NORTH LANARKSHIRE