"Jews collaborated with the Nazis during World War II, helping them to round up their own people in the hopes theyd be the last to go.

As a student of WW II history I seriously doubt that this was a common occurrence. However one prominent Jewish far left Democratic supporter, George Soros, is documented as doing just that. And I don't believe for a minute that the fact he was a teenager at that time changes the situation one bit.
Jim

The 2nd Amendment IS an unalienable right.