If a leading Nazi could easily go into the ranks of the US government and kick start its space program that eventually led them to land on the moon and everyone was perfectly OK with that ... then it would become much, much easier to ignore every lesser Nazi that ever came out post World War Germany.

Look up Operation Paperclip and look up the history of Wernher von Braun

https://www.pbs.org/wgbh/americanexperience/features/chasing-moon-wernher-von-braun-and-nazis/

In post war Canada as many critics have pointed out ... it was far easier and more acceptable to be a former enemy Nazi and Fascist ... then it was to be a former war ally socialist or communist.

Our ancestors and relatives who fought in this war against one ideology came home after the war to mix with the same people they fought against supporting the same ideology they had just fought against a few years prior.

The worst part of this history is that Nazism and Fascism is like a cancer that we allowed to stick around after the war and we literally fostered and grew it ever since and now we are dealing with it all again .... all because a small group of entitled morons, millionaires and billionaires were afraid of a bit of socialism that could have spread the wealth a bit to everyone else.