None of those designers had to join the Nazi party or SS because Von Braun did it for them. He was told he had to suck up to Himmler to protect the program. He

None of those designers had to join the Nazi party or SS because Von Braun did it for them. He was told he had to suck up to Himmler to protect the program. He was obviously ambitious and it suited his ambition well, but he was also protective of his team. And Von Braun ended up being arrested by the Gestapo for perceived disloyalty. Hitler only approved his release after Speers entreaties that Von Braun was indespensable.