Earlier quoted context omitted.
I'm not going to defend shooting anyone, obviously. But YouTube has captured the entire market, practically, for streaming video, and encouraged people to look at it as a way of making money (even a full-time time job, for many). Why would you be surprised that someone would be upset about a capricious decision, which cannot be appealed, suddenly taking away the money?
I'm not surprised. While I love YouTube, most of the YouTube personalitys seem to be emotionally unhealthy and making videos for people drawn to that sort of psychic disorder.
youtube was a platform for which people with issues could still produce an income, gain an audience, and be part of a social group (even if it was just subscribers and comments).
During the great boom era of youtube, it certainly helped lots of depressed and down on their luck people that had a creative spark. It's not that youtube draws them, but that they are desperate enough, and youtube was a good opportunity.
Now youtube becoming more mainstream means that those opportunities that it used to afford to socially awkward and/or depressed people no longer exists. It's a sad outcome imho.