Except that the school didn't force them to do anything, and didn't even suggest that it was going to do so - it just asked them, very politely, to think about how their Halloween costumes would look to minority students before they embarrassed themselves. Apparently this is an attack on free speech because it might make white students uncomfortable wearing blackface, though. The students are protesting someone who literally demanded that the university not ask people to think about other's views because it might make them uncomfortable, and called it free speech, and apparently this is them demanding to be "coddled". Because some speech is more free than others.