Would you watch a sitcom about Hitler and Stalin?

Isn't that essentially the democrat primaries as per Joe Biden and Bernie Sanders?

No. Actually I watch no sitcoms - ALL of these are intended for the brainless.

Would it star gop nazi klownz at trump rallies goosestep in the kkk in Charlotte

There's actually a movie Showtime did, a dark comedy, that stars Iwan Rheon (of Game of Thrones fame) playing Hitler that's about his time in Vienna as a young man before WWI trying to be an artist and him trying, sort of, to get along with his roommate, played by Rupert Grint (of Harry Potter fame), albeit his roommate isn't Stalin. Stalin is in the movie, though, just not his roommate but a friend of his roommate. Stalin's character is listed in the credits merely as Josef (played by Dustin Demri-Burns, whose prior claim to fame, ironically, is playing Hitler in the UK's show Drunk History). Needless to say, Hitler absolutely hates Josef.

Don't see the comedy in it,,, might work as a subplot in a movie about something else but not enough there for a regular sitcom.

I find anything to do with those two even slightly humorous.

no.