> Ukrainian-Hungarian border hasn’t moved since WW2. <
Oh, yes. Agreed. But that doesn’t matter much. Hungarians on the “wrong” side of the border still consider themselves to be ethnically Hungarian. Just as a Cherokee living off official Cherokee land still considers himself to be Cherokee. There is nothing wrong with that.
But I will concede one point to you. Those Hungarians have every right to teach their children Hungarian. They even have the right to teach them only Hungarian. But it is a major mistake to teach them only Hungarian.
Such a thing only serves to fracture a society.
WW2 borders changed tremendously, so a lot of people ended up on the "wrong" side. The "controversy" is over whether public schools in Ukraine primarily teach in Ukrainian or not. Hungary demanding that Ukrainian schools in Ukraine teach primarily in Hungarian is ridiculous.
“Those Hungarians have every right to teach their children Hungarian. They even have the right to teach them only Hungarian. But it is a major mistake to teach them only Hungarian.”
Then you should have no issue with Ukraine, because Ukrainian schools teach other languages, as well. There is a big difference between teaching another language in school and the school teaching IN another language.