Since our Federal ...
... government decided to allow Texas to become Del Notre De Mexico by not enforcing the Laws of the Land, a large number of citizens consciously or subconscious recognize we are transitioning to a higher level of crime which is spinning out of control and no one on the Federal level is going to do anything about it.
Legal Hispanics and Latins are not the problem as many are fine citizens and contribute to the betterment of Texas. We have one of the most diversely balanced population of just about any other state. There has always been a greater respect between all cultures in Texas than in most of the country as a whole.
It's the murderous crime elements that have virtually free access to funnel everything through Texas at will and all supported by Federal laws. Our highways are used to transport drugs and traffic in human slaves all supported by big government, industry requiring cheap labor and even the law enforcement / legal / judiciary / criminal warehousing "business" complex.
Texas has been sold out by the Federals and citizens are starting to understand we need to protect our families, our assets and ourselves because no one else will stop the criminals and it's only going to get worse, sooner than later. So yes Texans are arming themselves at a higher rate than most other states, because we see and live it on a daily basis.
Texas along with New Mexico, Arizona and California will all eventually suffer the same fate if we don't arm ourselves. The difference between Texas and the other three border states is they are becoming predominately socialist enclaves while we still prefer to take care of business ourselves.