He's backpedaling - his rant caused a whole lot more attention and negative reaction than he ever expected and since he's essentially a politician (he's running for Sheriff) he's now in damage control mode. He is only sorry that he shot his mouth off and caused a stink.
I knew that area well since I lived near there for quite a number of years - most people in that area are staunch conservatives and think that they are good Christians, and they don't care for people like us. That area is a strange mix of old money, rednecks, and poor people, all of which would be quite receptive to his original message.
The town of Denton which is in Denton county is a college town - the University of North Texas is there, so you have a fair number of liberal kids wandering around, but they have no political and not much economic power. Denton county is mostly agricultural with large farms - thats where the old money is. His original message would resonate very well with the gun-toting Christian people that live in the area.