Read a book.
The US took Nazi rocket engineers precisely to stop the USSR getting hold of them.
After they got them they didn't really know what to do with them, they were deeply mistrusted and were sidelined in the US's rocket development programme for many years. It was only after many very public cock-ups that they were finally allowed some input.
I don't know where you got that info. from --- it's complete nonsense .
Assume that is what they teach in the US .
I could give you chapter and verse on key positions taken by Nazi officers in the Manhattan Project and then the CIA .
Better you DYOR and read Doctor Joseph Farrell's detailed results . Seminal work .

