for 30 years... without Paul lifting a finger or uttering a word in condemnation of it... sure... that's believable.
It is given the convoluted structure and practices that take place in Washington.
And no one would have ever mentioned this to him? For that to be true, his entire campaign staff would have to be complicit in it. Then that raises questions about Ron's Competence, he doesn't realize his staff are all Neo Nazis... I'd prefer to assume he himself is one, because that's more plausible.
If it aired for a month when he was famous that would be one things, but for 30 years when he was a nobody, no dice.