Hyperbole which isn’t quite hyperbole, which treads in the paths of actual infamy (as was pointed out, “subhuman” was a Nazi term and we know how wonderful that turned out) becomes a problem. Calling him a clueless flop eared monster rabbit would be hyperbole. Calling him subhuman drags Nazi spirits out of their grave.
With freedom of speech comes NOT an excuse-all card (this is NOT a blind right wing answer to the race card) but responsibility. If you use it to channel historical ugliness, you have no basis to whine when others use their freedom of speech to highlight that fact. That said, most people think Obama is abominable, and don’t need Ted Nugent in order to get them to think that, but can’t imagine how America could get anything better. There is a way to get something better and it’s called gospel. Can Ted dare to echo heaven rather than hell for a change?
Dredging up ancient Nazi connotations is not really applicable here. To make such an assertion one must have a very detailed knowledge of rather obscure notions within the greater horror of Hitlerism.
Until we reclaim the language, we have lost. Goody Two shoes notions are counterproductive.