Were ex-Nazi's in post-WW2 America really treated favourably?

by MrMcHaggi5

I am currently listening to the latest podcast from Damn Interesting and in it, they mention:

In America, Wiesenthal knew that Nazi war criminals slept easy. Not one former Nazi living as a U.S. resident had been extradited by the government in the nearly 20 years since the war’s end.

Is this true that nobody with ties to the Nazi party has been tried if they were residents of the US?

Is this because not many Nazis fled to the US or because of complications around how Nazis were used by America in the late stages and post-war in the science and tech fields?

voyeur324