I'm no expert, but this podcast series seems to suggest Von Braun was mainly very focused on shooting rockets to the moon and fiddling the right guys to get crazy amounts of funding for that goal. I'm not saying he wasn't a nazi, he was, but exterminating jews etc was probably not his mean focus in life... In the Von Braun case it was propaganda towards his own leaders, to get lots of money. The reason he's well remembered is not propaganda but because what he tried actually worked out very well and was the basis for pretty much every rocket since. If he'ld happen to live in Soviet Russia, he would probably have become a member of the communist party, whatever would get him more money/free labor for shooting new trials towards space.