And that is why my guess is that you are seeing carpet-bagging New Yorker retirees that moved to Florida to avoid state income tax. The view from here in northern Virginia is that they always seem to bring all of their social/political baggage with them as well.
I used to be in Myrtle Beach at least once a week on business and even then there were more and more transplants from the northeast moving in. Some were fine people, unfortunately some were blithering idiots.