They were expelled, according to David Boren, the OU President, for violating school rules, which forbid students from creating a hostile environment for other students.
That will in no way hold up in court with the video that went public that was cited by the university itself. That is way to broad of a brush and a judge will throw that right out and side with the defendants for violation of free speech.
It's not about what was said it's about the fact that the University is saying you cannot say what we deem wrong, so you will be held accountable and be expelled.
2 points,
1.) A university cannot have a rule that censors ANY student from saying what he or she want to say no matter what it is, and that is backed up by the constitution free speech.
2.) A student cannot be silenced by a PUBLIC University for saying what is on his or her mind no matter what was said. Period.