This Texan is wondering the same thing.........
This article gives some of the reasons.
http://gunwatch.blogspot.com/2013/08/txcome-and-take-it-means-to-restore.html
Primarily it is because Texas has not fully recovered from the tyranny imposed on it by the reconstruction government.
After the carpetbaggers were thrown out, the Democrats found that they liked a certain ammount of tyranny, especially when applied to former slaves and other groups not in political favor.
To those of you who wonder who is doing something to make the situation better, here are some people puting it on the line for liberty:
Three Men ‘Illegally’ Arrested for Openly Carrying ‘Black Powder’ Pistols in Texas
http://www.freerepublic.com/focus/f-news/3066928/posts
The picture on the thread is quite good.