Jokes against the Jewish
(But that one about the boner is pretty funny)
my great-grandfather died during the holocaust.
he got drunk one night and fell out of the guard tower.
(I lie. My great-grandfather designed armor during the Blitz.)I mainly can't stand people joking about things that they don't actually understand. Like making jokes about technical subjects that they just don't get or are incredibly dry. I don't feel insulted, but it's annoying.