The base of the Democratic Party is pro-Hamas. If he betrays Israel, he'll lose the Independents so he'll fail to win even Michigan and Pennsylvania, states where Trump won in 2016.
Electoral politics have interesting consequences.
Four decades ago the Electoral dominance of NY meant that NYC Jews could determine a Presidential outcome.
Nowadays, with many migrated to Miami their influence has been greatly diluted.
They have neither turned Florida "blue" nor tilted NY "red".