Earlier quoted context omitted.
they are probably referencing an antisemitic conspiracy theory. I can't tell whether as a joke, or seriously. In any case, it should probably be downvoted, or dang should remove it. it's psuedohistory, invented to spead hate.
I think it’s obviously it’s a joke. However, there’s even a smiley at the end of the comment, as a clue for the people with broken humour detector. I hope you saw it.
If it really is a joke, what is the punchline? How does it work? What's being made fun of? That it would be outrageous for someone to say that seriously? As "red pillers" like to say: keep making jokes until the joke really lands (i.e. accustom people to hearing it by framing it as a crass joke so they'll no longer flinch when it is said in earnest).