Whether racism or class-ism or some sort of paranoia, the shooting was not random or lacking motive.
We will perhaps know more in the next few days (no thanks to the legacy media - and I absolutely distrust anything coming out of the feebs), but we're looking at a shopping mall, outdoors-oriented, and on a weekend.
If he's got weapons and transportation, and given that it's in Texas (where all travel is measured not by the mile, but by the hour it takes to get there), I'm not sure there's more to it than that.
Yes, I lived in Texas for a short time, in 1982.