Student protesters: I admire your empathy for Gazans, your concern for the world, your moral ambition to make a difference.

But I worry about how peaceful protests have tipped into occupations of buildings, risks to commencements and what I see as undue tolerance of antisemitism, chaos, vandalism and extremism. I’m afraid the more aggressive actions may be hurting the Gazans you are trying to help.

I’m shaped in my thinking by the Vietnam War protests of the 1960s. Students who protested…