That is what they are. They are Zionists. There are many Jews who are anti-Zionist as well, so that line of reasoning that anti-Zionism is antisemitism falls flat right there.
They did not prevent JEWISH students from going to classes. Infact, they did not prevent anybody from going to classes. They were asking him (and possibly others) to take another route possibly because they have encamped that location to protest. You posted a 20 second video of a Zionist crybaby playing "This is what they do guys" for the cameras. All I saw were that the pro-Palestinian students were just calm and decent.
The one who was being loud and intimidating with a camera in their faces was that professional crybaby. Infact it is always the pro-Zionist supporters who are intimidating. Did you read about the recent case of arrest where a guy with a nail gun started threatening pro-Palestinian protestors and shouted "Every fucking Palestinian will die!"? Now THAT is intimidation.
That Jewish kid was actually the one intimidating and getting physical with the protestors, while making sure the cameras were on.