Not many people know what american jews though about ghettos and holocaust before pearl harbour.
They did nothing to help other Jews.
Idiotic.

What were they supposed to do? The strongest powers in Europe were worthless against German military superiority.

However, hundreds of thousands of Jews joined the American, British and Canadian armies to fight against the Nazis, and millions of them bought hundreds of millions of dollars worth of war bonds. What more could you ask of them?

I doubt a special Jewish army would have stood any more chance against the Nazis than the British, Polish, and French armies combined did.