I find it ridiculous to claim that because jokes get co-opted, adapted, and molded to fit the worldview of people telling the joke (ie Wolfgang's example of the joke in the opening of this thread being common among neo-Nazis), that we shouldn't tell the joke.

Same for the joke cited by SRS, which has been around forever (sorry SRS, no comment on you, it is a funny joke, but I heard this one about 10 or so years ago). I've heard it about Baptists in the southern US and Calvinists in Scotland. Of course, as some of us know, the former has it's cultural roots in the later, which makes the joke easy to spread through those cultures.

Really, it is just a joke. Jokes often are dark because humor, and dark humor especially, is a good way to cope with the terrible things that happen in life. Whenever people respond to what is obviously meant to be a harmless joke about a detested politiican, as if it were a racist or sexist joke, or a tasteless joke about someone with disabilities, or some such, it quickly becomes clear that one is in the presence of literal moralists who just plain don't get and/or can't appreciate the cleverness or irony of the joke. It is usually the Pollyanna, I see the world through my "NICE" lense, sort of people who don't like ambiguity, grey areas and all that.

The inability of such people to find humor in the original post's joke is a sad commentary on them, though. Not the joke teller.