As a sadowitz fan.
Jimmy Savile - indeed he did out him around 86 or was it later? The audio tape was called Gobshite and it was withdrawn because of libel towards Uncle Jimmy. It might be on Archive.org. the joke is something like "when a kid disappears they should send in an expert to find him like Jimmy Savile etc" and "he sounds like if someone vocalised having a wank"
In Canada: It was Montreal just for laughs festival, I think early 90s at a guess. He opened with"Good evening Moose fuckers", but what got him punched was "I hate Canadians. The trouble with you is half of you speak French and the other half let them".
I've listened to some of his bootlegs, newest one I've heard is 2013,but I've got a 2018 one as well. It does indeed say chink, paki, mong, spastic, nigger, jew boy and loads of other offensive words as well as rape jokes, paedo jokes, sexist jokes, holocaust jokes. As I've said the harshest stuff is usually directed towards himself and it shouldn't be taken at face value he rips into everyone.
You can see a downward spiral in comedy in recent years. Frankie Boyle IMO hasn't been funny since he started doing that new world order TV program, Jim Jeffries still has some howlers, but not as funny as he was 10 years ago, Stanhope has always been hit and miss so I don't know. This year Chubby Brown had a gig cancelled in Sheffield and Andrew Lawrence isn't touring because he dropped by his management company.
It's not people telling jokes which is a problem, it's people telling the wrong kind of jokes. Sometimes Sadowitz tells real barrel scraping Christmas cracker jokes, occasionally he says something thought provoking and truthful. Not defending racist jokes, but I will defend free speech. We saw the same bollocks in the late 90s were they burnt crosses and got a load of comedians cancelled - Manning, Carson, Mick Miller etc. Even Lee Hurst. I think a lot of it is professional jealousy Sadowitz, Chubby, Davidson can sell out on name alone and word of mouth were as people like Sara Pascoe have to do crap podcasts and panel shows to flog their arse.