I’ve been on campus through one of these. The shooters usually don’t have any personal animosity for the people they kill. They are just killing.
Watching this guys film he continued to unload his weapon ruthlessly on already shot and downed groups people.....that's overkill which always depicts one 'full of rage'........this guy was well beyond hate and anger. His manifesto was 'justifying to himself' his lust fo killing in his twisted mind.