You've also shifted your criticism here to "Ok, but how?" from the original criticism that sounded like "Well, humans suck. Boo hoo."

So, here's one answer to how: as I am doing right now, we can encourage others to be optimistic about growing and developing ourselves and our communities into better people.

Here's another: as I am about to do, we can pinpoint unhelpful claims that hold us back from improvement rather than moving us forward. Your comments so far have largely been the former, in that they treat the people the article's author criticises as though they couldn't behave any differently. One key step is adopting the belief that people, including the people who have been really nasty so far, can in fact choose to behave differently.

Here's another: We can be vocal about the importance of maintainers standing up for respectful communication within their communities. We can create and spread resources that help empower people to do this. We can institutionalize roles such as "community maintainer" whose job revolves less around code and more around discourse.

These are coming off the top of my head. So on that note, here's another: we can encourage people to do one more thing before posting a comment or article – check in about whether what they're saying is truly constructive, and redirect their efforts if not. I'm sure you could have come up with some of these approaches, and I'm sure you could come up with more that I haven't thought of. But you need to push yourself to try. You need to push yourself to get better. And the rest of us need to be here to help you and each other and everyone else do just that.