A surge of anti-Jewish vitriol spread by celebrities is stoking fears that public figures are normalizing hate and ramping up the risk of violence. Former President Donald Trump hosted a Holocaust-denying white supremacist at Mar-a-Lago. The rapper Ye expressed love for Adolf Hitler in an interview. Basketball star Kyrie Irving appeared to promote an antisemitic film on social media. Those are just a few recent examples of influential people abusing their platforms to amplify antisemitism in a way that has been taboo for decades in the U.S. Some people say the incidents harken back to a darker time in America when powerful people routinely spread conspiracy theories about Jews with impunity.