You are 100% correct! Jimmy zealously guards details about his "infection" because if pressed for details he knows that his stories would crumble. He claims he had COVID by the way, and in a typical antivax fashion, he claimed it was "just like a cold." You know that someone who was actually sick with COVID would not be dismissive of it. He is just flexing trying to be cool in front of the other Stooges.
Jimmy has also claimed that both his parents are vaccinated, but he is not. To me, this has never made sense. Why if he is so convinced that the vaccine kills, would he then allow his parents to risk their lives? I conclude he doesn't love his parents, or he is full of shit and he is already triple vaxxed like his parents.
I can't really agree entirely with the "great cleansing" scenario you present, although I am sure that the world could benefit from a few less humans. I think that education is the problem. If science was not an "elective" then it wouldn't be so hard to educate the public on public health matters; or people wouldn't seek answers from pseudo science.