Regarding the Israeli-Airplane story: (This is a crazy rabbit hole)

So President Trump tells the story, "according to Bibi," (which Trump says may not be true) that the hero was a Jewish plumber.

Apparently there is a famous Broadway play that is well known in New York (Trump's home) called Jewtopia, and the main plot is that a gentile plumber is lying to his Jewish girlfriend's family about being Jewish, and so he has to pretend to be a doctor because nobody would believe a Jew would be a plumber.

This is apparently an old stereotype from New York that dates back to Eastern Europe, because Jewish plumbers simply aren't a thing.

So when Trump says "Jewish Plumber," I think he's saying that the whole story is bullshit, because Jewish plumbers don't exist.