We're really going full speed ahead with the germ theory denialism, aren't we? I look forward to the spirited debates about whether miasma theory is true or whether the oppressive smell from untreated sewage collecting everywhere is actually good for you.
It's not even eugenics at this point, eugenicists had a coherent ideology, albeit one that needs to be destroyed. This is a reaction against the notion of public health, against the idea that social determinants of health exist, that health is anything but a consequence of an individual's choices as a consumer and their personal virtue. Anyone who dies from an easily preventable disease deserves it for not being a rugged enough individualist.
Any intervention on a scale larger than whatever some crank on social media is selling is basically communism and must be destroyed. This is an ideology that can only take root in people who have been the benificiaries of hundreds of years of millions of people's labor spent so they would have the privilege of not seeing infant and childhood mortality rates at pre-modern levels. It's pro-suffering for the sake of suffering.
Eugenics is tragedy, this is farce. A humane society would put people who sincerely believe this shit to work doing disease eradication. Let them go down to the countryside and live with the people their idealism is killing.
I don't think we're actually going to recapitulate all the prior theories of illness leading up to germ theory, the reality of having the prosperity gospel guiding public health policy in the US is far worse. All this for what? What's even going to be left to rule over? I don't know that anyone's even thought that far ahead, all the clear-eyed ghouls who were pulling the levers of power are gone and the slapdicks who replaced them all seem to sincerely believe the shit they're peddling. I don't think they understand that the infinite variety of contagious diseases we're letting run rampant don't care how rich you are, or how many precautions you take that you won't let the masses have access to. Like the IRA told Margaret Thatcher: we only have to get lucky once, you have to get lucky every time. Plagues don't discriminate. Will it fuel pogroms? Sure, but it doesn't keep the instigators of those pogroms from dying agonizing, preventable deaths.
I don't know if miasma theory is completely off the tables, actually. I could see libs adopting it as some kind of counterproductive attempt to triangulate some kind of public health policy while ceding material reality to the fascists, that's their whole thing. Why organize effective resistance when you can fight battles already won and lost while chuckling at how clever you are?