Going through brutal things will destroy your empathy. I am fine with this guy standing trial for his crime but I don't think it was really "his fault" at the end of the day after how he grew up.
Some people have strong character and they can turn out fine no matter how you treat them. Some people, you can give every opportunity in the world to, and they're still going to turn towards the dark. For most people, it's down to circumstances.
That's why it is important to create good circumstances. The schools, the police, the meeting places where people hang out, the shops and the structure of the economy. It all has to serve the good, it has to be alive with life. Because the people who are in it will be molded.
"Raising a rifle" has a single fairly unambiguous meaning to most people I know; although we have only the story's word for that being what happened, it's not like a confusing type of description of events, along with the other elements (him retrieving the rifle instead of having it carried with him, running towards the crowd ignoring people trying to talk with him, and so on.) I actually think they did a pretty good job of explaining the circumstances which sort of clearly point to one conclusion, without doing anything other than presenting the factual circumstances.
If we assume that what's in the story is accurate, then yes, to me there is.
Correct. So why did you speculate that he may have been a leftist? I never said anything about his political leaning or the underlying motives.