How so? In all of the instances you cited, the LEO were on the right side. They were also correct in the killing of Christian Taylor, the thug who broke into the Arlington car dealership and started a rampage of vandalism. As I see it, Texas police aren't cowed by political correctness or the commie-controlled Black Lives Matter outfit.
The police chief in the McKinney case disagrees, and called the cop's actions "indefensible". The cop (Eric Casebolt) himself said he was wrong too, and resigned.