That article isn’t very specific about how exactly they “expressed support” so it’s really hard to say if they were expressing a gross political view or actively inciting violence. I certainly don’t think saying “I support Hamas” should be illegal any more illegal than saying “I support Russia” or even “I support Israel”, but it crosses a line if they tell people to commit acts of terrorism or give material support to Hamas.

I suspect they were removed based on a violation of a student code of conduct, which I think is the right way to deal with high-profile assholes at universities, just as employment agreements are an appropriate way for employers to deal with conduct that’s obnoxious but not illegal.

At any rate, I’m certain Israel already has laws against incitement to violence that were written at a time when people were a bit more level headed. I can’t see an attempt to further criminalize speech as anything but an attempt to stifle political speech that specifically does not incite violence.