Klingons are by culture politically incorrect. But they would be accepted in America, not as a counter culture, but as different. And accepting the different is acceptable, even fashionable, in the U.S.
The Klingons could talk against gays, women and various selected minorities and their comments would be accepted by the media and powers that be. But if an individual, not of the accepted group, made these comments she would be vilified. This vilification would be enhanced if she was not a member of the prevailing media political culture.
To be clear, if you want to exercise your free speech, do it as a minority or a Klingon