My wife was born in Chicago, grew up in Milwaukee, has lived in S. Dakota and Oregon. She is conservative and a Christian. We live in Alabama. So there is that. A lot of conservative northerners have moved south. So have a lot of liberal ones, especially to big cities like Atlanta.
As I said earlier... I expect that if some lefties move south, they will likely congregate in liberal bastions such as Austin, joining in with the home-grown lefties.
Snow birds..I can't account for
some them, and I don't blame folks for being pleased at their departure. As anywhere, some are confirmed hard heads, others just "down home country folks".
Living in the south, whether Texas, South Carolina or elsewhere, I learned a few tips quickly..
1) Don't put down local custom.
2) Don't make comparisons to "where you live or came from"...certainly not negative comparisons!
3) Some folks, I will never please..so avoid them whenever possible. Just "Accentuate the positive, depreciate the negative."
4) Live the golden rule.
5) Don't talk too fast..
Generally those rules seem to make sense. I found they worked well in Europe for me too, when I lived there.
..And oh, BTW.. Today's US map, by way of the 20th century population mobility phenomenon, doesn't look anything
like the old, outmoded Mason/Dixon model!
Allowing for some exceptions, it looks more like the map below..