NEW YORK — Anti-Zionist activist groups in New York City on Sunday backed a Muslim leader who led a walkout from a college interfaith event after decrying a fellow panelist as “Zionist.” The groups also condemned similar interfaith efforts. Last week, a Muslim leader, Abdullah Mady, spurred around 100 students to walk out of an interfaith event at Manhattan’s City College of New York after castigating the Jewish community representative, Hillel leader Ilya Bratman. “I came here to this event not knowing that I would be sitting next to a Zionist and this is something I’m not going to accept....