The leader of an LGBTQ group at Columbia University is excluding any supporters of Israel from an upcoming black lesbian film event, The Post has learned. With the conflict in Gaza raging, an organization called LionLez sent out a message to students promoting an on-campus “Black Lesbian Film” event said explicitly said no “Zionists” would be welcome to attend. “It’s FREE PALESTINE over here. Zionists aren’t invited. See you soon, Lion Lez,” read the promotion for the Friday night showing of the two flicks, including one called “Shakedown” which “chronicles explicit performances in an underground lesbian club in Los Angeles.”...