Suggestion

Given the open antisemitism of the Democratic Party I wouldn't be surprised some Jews are leaving the party.  Is it necessary for them to join the Republican Party?

No.

Perhaps it's time to start a new political party.  Is a new political party possible?  The answer is that I don’t know.  The opponents of chattel slavery proceeded even with public opposition.  As opponents of political power have to.  We need to treat exercises of political power, such as censorship, as crimes against Humanity.  We need to treat bans on firearms and free speech as the anti-Human acts that they actually are.  Our political elites have apparently forgotten the lesson taught by our original civil war, that banning freedom doesn’t work.  Our political elites tried to ban the voluntary consumption of alcohol, it didn’t work.  Our political elites tried to ban the voluntary consumption of hard drugs, it doesn’t work.  Our political elites will try to ban the voluntary ownership of firearms and freedom of speech, it will never work.  Our politicians are supposed to do a specific job and they aren't doing it.  We have to start a new political party to go around them.  We don't have a choice.  Let's call our new party the Freedom Party.