Having now been elected mayor, Zohran Mamdani will have to change his ways if he wants to be effective in City Hall when his term begins on Jan. 1., less than two months away. To start, and most personally, Mamdani will have to drop the pretense that he doesn’t foster antisemitism through his positions, stemming from his monomaniacal obsession on Israel being the source of all the world’s problems. This is not about his support for Palestinians, but his angry hatred for Israel, the world’s only Jewish state. While he said he would fight antisemitism during his victory speech Tuesday...