Why Did Dressler Let Them Go?

Maybe his wife was a Jew undercover or a family member.

"I don’t mind being in a man’s world as long as I can be a woman in it"~Marilyn Monroe

was for the money.
remember before joseph got on the plane he told Dressler, not to forget what we arranged and then Dressler said, and also the bank transfer.

so maybe the gold was the upfront money, and then there would be a bank transfer once they arrived which would of been A LOT of money.