The entire first sentence of the parent comment is alluding to the cultural (read: political) state of the area, in their opinion. People are allowed to respond to that.
That only works if you read the comment to be meaning that people in Texas - Texas, mind - consider 'conservative states' as being 'evil places of hate'.
I think that the 'cultural reasons' they're referring to are probably more likely to be stereotypes around those areas being home to backwards inbred hill people who marry each other's cousins at gunpoint, have two teeth remaining, use outhouses, etc, etc.
Every group needs some other group to look down on, I guess.
To elaborate, my views of OK and AR were a sort of common Texas view that it's a backwoods and backwards place. Just sort of run down and no reason to go there. Obviously I am wrong.
This certainly isn't about politics as, well, there pretty much isn't a more conservative place than where I come from. It didn't occur to me that someone would inject left/right politics into my comment, but I guess that's just the way things are now.