Editor's note: The column was co-authored by Bruce Abramson. Anyone concerned with Jews and Israel should be horrified by the Democrats’ newly released 2020 platform. It directly threatens the Jewish state, employs double-talk calculated to stoke antagonism between the American left and Israel, and pays passing lip-service to opposing antisemitism, but in the gaslighting way Linda Sarsour and Ilhan Omar do; to deny it where it exists and point fingers elsewhere. In both narrative and policy, the platform crosses over the line into deep antisemitic territory. It’s a dangerous acceleration of an approach first tested when Joe Biden was Vice...