I'm happy to hear that's your experience. My experience comes from being raised in such a place (not the south, just rural conservative), and fleeing to the nearest metro region as soon as I was able while growing up. That was a while ago though, and this was over LGBT things - a bit less about abject discrimination and more that it was impossible to even think about finding a date, and a fear of being found out with people regaling me of stories of houses of known queers being firebombed in recent years. I don't really speak about the stereotypes of the ignorant rednecks - the most virulent haters were the orderly christian pastors and the true believers who opened up multiple conversion camps in my area. There were 2 black students in my high school of 1500 kids, and both of them got pulled over literally dozens of times in just a few short years, and it wasn't for driving fast.
Culture has changed somewhat since then. I don't presume to speak for anyone's experience but my own, and I go off of the stories that my friends have told me for other things.
That said, Trump flags fly everywhere, and BLM flags get torn down/burned/vandalized. I don't think its really fair to say that its all politeness and mutual respect - in my experience that is how it is until you accidently fall into one of the cultural battlegrounds, and then its more conform or die. Lastly..
> The truth is that urbanites have been hypersensitized to so called racism
I think this can be true while the rest can also be true.