Well you're not wrong. He'd have to be pretty into it though to know all that at the time. It wasn't hidden but it wasn't promoted either, for obvious reasons.
From what I'm finding about him, the only reason he really joined in with the nazi party was to be able to make rockets and do aerospace engineering. It's not the best look but it's not like he was also a psychopath strong desire to kill Jewish people.
Had a man tell me that he as a first generation American, who essentially lived the ideal, Never dreamed of seeing democracy possibly leave the country.
Hearing that from people who have actually lived in different circumstances makes your eyes open if they weren't already.
But they are not. The space program is run by nasa. Thats why spaceX was a big deal. It was a private space company. The US space program is not private.