There's "None of us are above being laughed at, we shouldn't take ourselves too seriously", and then there's "You better laugh, or I might turn on you next." The former is funny; the latter is a threat painted as comedy.
A lot of people think they're being funny when they're just being mean. As if they haven't developed past grade school humor and expect people to still laugh because they want to be in the "in group" instead of laughing at something that's actually funny. Comedians know that it HAS to be funny. Funny first, mean second.