> there was no complete working device until after the Nazi's surrendered
Isn't an argument. If the Nazi has gotten it first they'd have used it and likely won. Others would have surrendered in the face of the overwhelming power.
They were flapping about in the dust, had no clear path, and lacked the resources to do what was required, what resources they did briefly capture were destroyed (eg: heavy water source).
You may as well say Japan would have made a weapon from their atomic pile program.
Isn't an argument. If the Nazi has gotten it first they'd have used it and likely won. Others would have surrendered in the face of the overwhelming power.