The main reason the schools are scared to accept his children is that he is such a sick guy that they are afraid he will mussar them if he finds even the most petty reason to. He will have them tip toeing around him and that is no way to run a school. He did this in NY, where the principal there is still crying about him. He would mussar his own mother. He keeps his wife locked up all day just like the talibans in Iran. She wanted to divorce him many times, but he threatens to kill her if she does. This whole situation is not so simple. He has been thrown out of Vienna and New York and, since his wife is from Antwerp, he ended up here.
It is such a chillul Hashem here because the media is eating this up. They had to rule that Belz had to take them because first, they are state subsidized, plus then some government schools might use that tactic to refuse muslim children.
Of course, it is the children that suffer. They are being brought up very dysfunctional. Then they will get married and continue this crazy cycle because they know nothing else.