I actually think the more productive discussion was the one dealing with the semantics of what some of us consider "mentally ill", responsibly mental illness, how mental illness does or doesn't cause paranoid racism, and also the effects of the JW upbringing
It's really hard to have a discussion about this because so many don't understand mental illness or have an inner need to assign blame on a person no matter what and can't even consider that people can do bad things due to bad luck out of their control because it destroys their worldview. People just want an easy "good people/bad people" worldview because nuance and reasons and other things are too hard for them. That's why progression on the mental aspects of crime go so painfully slow, as well, many people want the "easier" route of "someone does something bad, kill them/lock them away" as opposed to trying to figure out "why" so we can head these things off earlier, in the future.
I have a TON of experience with schizophrenic and bipolar people, and this guy's rant reads EXACTLY like bipolar people I've seen. The subject jumping, extreme paranoia, and history of perceived persecution reads as textbook examples of it.
It SEEMS like this was unchecked, which is why it led to what it did, and I wonder how much of this has to do with his witness family (possibly "abandoning" him because of his gayness, or not exploring mental help because they thought "Jehovah will fix this all in the Paradise?"). Bipolar and schizophrenic people often need close knit family to constantly "watch" them because they naturally refuse to take drugs (either tied into their paranoia or because it makes them "feel weird"), and if he was going through life solo with these issues, it's easy to see why it reached this unfortunate point.