This protest is not a thing that matters. No one will remember this in a year, probably less than that. Because you can't just break random rules as a protest. You have to break the specific rule that is unjust. This building is not the center of Israeli government or the IDF.
If these students went downtown to the Holocaust museum and held up signs saying "Gaza is a modern Holocaust", that would work better. They could protest outside the Israeli Consulate too. It would also be more efficient to just call a bunch of representatives and senators every day. Get 100 students to spend one hour making calls per day and you can tie up the Congressional switchboard. Do that for a month and you will get a response.
These students are mainly protesting to feel good about themselves. They are taking the easiest and coolest route. Actually organizing for change is tougher than just occupying your own school. It's your school, you aren't taking it from anyone.