Dude has zero clue what the word “joke” means. Since when has making completely fucked up statements with no comic structure or punchline ever been considered a joke?
Although, to be fair, more often than not, Trump is completely serious and not claiming that he’s joking. It’s his handlers that lean the most on the “iTs OnLY a jOKe” bullshit
It's common for conservatives - their humor is pretty much entirely based on mocking or laughing at a marginalized group they consider lower than themselves.
Trump also proposed digging a water-filled moat and stocking it with snakes and alligators. If he was kidding, his aides didn’t think so, as they sought a cost estimate for the cartoonishly ludicrous proposal. Trump also wanted the wall to be electrified, and topped with spikes that could “pierce human flesh.”