The US was not at war until 1941, so it was legal for Prescott Bush to do that. Well, in any case, lot of people are guilty of that. Charles Lindbergh had photos with Adolf Hitler. Joe Kennedy had dealings with the Nazis too.
Let's see, they tried this kind of thing with Arnie in Califonia, and he only won by, what, a gazillion percent?
The Left embraced Nazism until it was clear it could not coexist with communism (which they much preferred because it was internationalist). They then began the myth it was ideologically right-wing and have been obsessed with it ever since.
If we went back and looked at how many democrats' grandfathers were flat-out commie symps, they'd be in big trouble. Or not, considering Kerry himself was and the MSM seems unconcerned.