David Horowitz is a child of these same communist parents and he has realized the perfidy of communism. Today he is certainly one of the most prominent anti-communists and pro-Republicans in the country.
There are quite a few just like him. They are just not as visible as the Barbra Streisands.
Older Jews remember the anti-Semitism of pre-World War Two in the U. S. (Remember Henry Ford and Charles Limburgh, as two examples). They loved FDR and have never forgotten him and have voted Democrat ever since.
Younger Jews don't have those memories or those loyalties. They are not locked in to the Democrat Party and more will be voting Republican in this election and in future elections.
No argument about Horowitz: he is great, but sadly, a distinct minority. And, I don't know how or why anti-semitism compels someone to join the Communist party or fight for the Commies in Spain. It's fine to be for FDR...it is not fine to be a Red.
When Jewish political sympathies start to fall more in line with the rest of U.S. society I will finally believe that the pernicious old commies and their spawn have been won over.