Almost all music is culturally specific; some help build that culture, others adopt it wholesale, and others adopt only parts (like the sounds). And people are complex -- most people don't craft a life of perfect consistency.
Gram Parsons rather memorably was not exactly part of "country culture." (See: McGuinn, Roger; how to tell Ralph Emmery to piss up a rope with just a smile.).
But the lyrics to many Skynyrd tunes are pretty socially regressive. And some were anything but. Happens.
I do understand the whole bit of not playing 'those songs' when you know who they're going to draw to a bar. That's criticizing the culture, and it's fair, and it has nothing to do with impugning the character of some band member.
I've had a lot of conversations with people the past few years regarding geographic stereotypes; hard to figure out just what's fair.