You legit think the cop thought “Hey, let me kill these kids!”

Yes, I absolutely do think that. Exhibit A are all the people in this thread that think attempted murder is an acceptable penalty for a child riding recklessly on a bicycle. Seeing as cops tend to have far less empathy than the human average, I would expect them to be less worried about civilian safety than the people in this thread. The folks in this thread are advocating summary execution for traffic violations, so I see no reason a cop wouldn't do the same.