I'm American, I live in south Alabama on the gulf coast. I first got into watching British shows about 30 yrs. ago and got hooked. I've always liked their type of humor, which can be plentiful in non pc jokes, especially the older the show is. It's part of why I watch them.
I'm also white and some of the funniest American comedy shows I enjoy are actually the older ones with black characters being very non pc towards whites, such as Sanford and Son, The Jeffersons, etc. I think they're hilarious. I'm smart enough to know the producers aren't trying to spread hate around, they are showing the bigotry of the characters with the message of "don't act this way". People need to just lighten up and enjoy life more, it doesn't last long.
I see the trend of "political incorrectness" with a lot of British comedy from the 70's, now that you bring that up (Benny Hills, Monty Python, Open All Hours, and the Blamire years of Summer Wine". When did these British shows become more tame? I know, Summer Wine became more of a family program when Foggy came in. Perhaps, around that time in the late 70's, shows generally became more family friendly.
I guess American comedies in the 1970's were a mix of family-friendy and edgy. Ron-Po mentions Sanford and Son. Sanford and Son is very good. Redd Foxx plays, Fred Sanford, an old, somewhat bigoted junkyard owner in Los Angeles. AN absolute classic show is All in the Family. This features the character, Archie Bunker, an old, stubborn, white bigoted man. Ron-Po, it is funny how the too characters are so similar. The characters are loveable, but part of the comedy is their stubbornness and ignorance.
On a final note, my VCR that I rely on to record British shows no longer works. My Public Television stations just started airing "Yes, Minister" which I think is great. I am only ab le to catch it on occasion.