Focusing on allegations is the issue. It seems clear that whether or not he was a spy, politics weren't important to him, science was his first master.

But people get focused on whether people are "with us or against us". He was with science. In the end, that's all that matters. Nations are not important.

the fact that this question even existed in the first place is the problem. there was no evidence. it was just a naked fabrication designed to get him out of the country on a false premise and to ruin his career.

and it succeeded, obviously, to great effect.