A pro-Israel Holocaust survivor who was turned away from speaking to Brooklyn middle schoolers about antisemitism called the rejection “censorship” and slammed the Adams administration for defending the principal’s controversial denial. Sami Steigmann, 85, insisted that if principal Arin Rusch actually spoke to him, he would be able to convince her that he would steer clear of hot-button Middle Eastern events — but he was never given a chance before being denied the opportunity to talk to kids