Today, President Joe Biden delivered the keynote address at the United States Holocaust Memorial Museum's Annual Days of Remembrance ceremony in the U.S. Capitol. In his remarks, the president reaffirmed the sacred pledge of "never again" and denounced rising antisemitism, unequivocally declaring "there's no place on any campus in America—or any place in America—for antisemitism or hate speech or threats of violence of any kind." I was in the Capitol when Biden delivered his speech, just as I was at the White House when he spoke with Jewish American leaders on Oct. 11, four days after the worst massacre of...