The good news is that like 5 years after college no one gives a shit about commencement or, for that matter, where you went to college. The most popular commencement speaker when I was finishing college was Bill Cosby.
what are you going to accomplish my ruining your classmates big day
At a guess... divestment from their university's investments in companies that profit from Israeli genocide? You know, the thing they say they want to accomplish?
I dont know if you've been to or in a commencement ceremony, but its by far the most boring fucking thing you can do with your day. You sit for hours and hours and hours while people drone the fuck on, just to see the person you want to see walk for 10 seconds. That's it. No one goes the for the vibe or to take part in some grand activity. It's boring as shit to everyone involved, with the only positives being the fun little mods people make to their gowns and hats. The protest was likely the second highlight of nearly everyone's day.
Secondly, this was a peaceful protest by people involved directly with the commencement. It hurt no one, cost no one anyhting, and was a grand example of self expression which succeeded at garnering attention to their cause. It's basically a perfect protest. Why exactly do you have an issue with it?