So what you're saying is if the captain doesn't like you because you're Zionist they can remove you?
That is exactly correct; it's his plane.
I think he would face discipline from his airline after the fact, but in the moment, he is in charge.
There was a whole episode of Seinfeld about a pilot forcing Jerry off because he just didn't like him. Seems legit.
Yes. The captain has the authority, by law, to remove anyone (or everyone) for any reason. There is basically nothing the captain is legally barred from doing while the plane is en route.
If you’re broadcasting strong language associated with violence? I’d hope the captain would remove you whatever side of whatever conflict you’re on.
What are some things Israeli settlers shout before they murder Palestinians? Shout a couple of those on a plane and see what happens.