At some point you have to blame the community itself, that example OP linked to is not an isolated incident, unfortunately.
Later edit: This [1] is a very sick and not ok community, a very sick one. Harassing a person in his own village, in his own house, on the streets of his own physical community, it's not ok. I didn't know who that Drachenlord person was until seeing OP's link, I'm left wondering how come all of that is legally possible, how come those persons that physically harass him are not in prison by now.
I think you have to be really in denial if you think that, on average, gamers are not a more toxic community than others. I think it's not that video games make people bad or something like that. But you probably have some demographics - like young men, for example - who have a lot going on in their lives and aren't always well equipped to handle it. The internet desensitizes everyone and I think that that can be a really bad mix with some people who spend time online and might have a hard time in their actual lives.
Online harassment would presumably be cathartic for some of those people. People lash out for a reason and this is just lashing out at scale.
This can be generalized to any passionate interest community.
Like body builders. Young men will be toxic. You just see gamers more because they spend more time on the internet by default.
At some point you have to blame the community itself, that example OP linked to is not an isolated incident, unfortunately.
Later edit: This [1] is a very sick and not ok community, a very sick one. Harassing a person in his own village, in his own house, on the streets of his own physical community, it's not ok. I didn't know who that Drachenlord person was until seeing OP's link, I'm left wondering how come all of that is legally possible, how come those persons that physically harass him are not in prison by now.
[1] https://youtu.be/-__r5B84Ymg?t=488