Wrong answer. The right answer should be that if you use force to stop someone from entering the university, that is assault and you'll be charged. No one forces you to come to university, and no one is going to be allowed to use force against any student.
I notice that the newsie never gets around to explaining what the strike is about. What are the negotiations about with the university leadership. Bad writing.
Whatever its about, the threat to resort to physical force should end the discussions. There is now nothing to discuss, kids, you've stepped in it and the discussions are over. Whichever student actually called for the use of force should be expelled immediately. I wouldn't mess with jerks.