Pretty much unless it is a major city or international melting pot kind of area, texas is...a bit silly. Like, the area I grew up in was a military town so we have a lot of korean and german and all sorts of fun cultures But travel 30 minutes in any direction and it becomes hicksville...
Anyway, I can't really comment much on this kind of behavior as...it kinda isn't a thing limited by region. People get killed for any number of reason, and while it is easy to speculate based on known factors, they may or may not be a contributing factor...
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There is no shame in not knowing; the shame lies in not finding out