The whole things reads like an airport novel, adjusted for a specific subject. It's what people who believe about a certain world view expect to see in that world. A tear-jerker for sure, but in practice, for example, I have a lot of anti-vaxxer friends, and even though I don't agree with their choice (but I agree with their choice to have a choice), none of them behave like the people in the story. They are not insane, they just strongly adhere to a certain set of believes.
People would point out to the writer's history, but in fact, their account is only 9 month old, with an average of a few posts per months. It's completely not unreasonable to believe that someone spends this effort to create an illusion of credibility. Heck, I know people with two dozen "active" hacker news accounts, doing the same thing, but in their case so they could promote key tech articles, instead of vaccines.
Internet is a lovely place, isn't it.