For months I've been begging @Columbia to take this seriously. For months, @Columbia has been ignoring escalating threats. Today, a Jewish student wearing a yarmulka was punched in the face. I know this student's family. I've met his parents. They're some of the loveliest people I've ever met. And they deserve better. This assault didn't come out of nowhere. It came from a pro-Hamas protest organized by the Students for Justice in Palestine at @Columbia university. It came from 13 months of hatred, demonization, and indoctrination, especially for observant, and thus more visible, Jews. It came from 13 months of the administration looking the other way. Columbia must start enacting rules inside campus and among their terrorist support cell. * President Katrina Armstrong, you have my number. I gave it to you when I emailed to congratulate you on your new appointment. I offered to help back then and I want you to know that my offer still stands: @Columbia University has a serious problem of support for anti-Jewish, anti-Israeli, and anti-American terrorism. It's undeniable. If @Columbia is serious about Jewish and Israeli lives and wants to solve the root problem rather than put bandaids on it, I am here to work with you. But I won't let you look the other way. You know who the leaders are. You have read what they have written, heard what they have said, and seen how they behave. You know it's time to remove them from campus.