I think it's generally poor judgment to post this sort of thing. You can pretty much expect a ****storm of opinions (many of which are uninformed) and very little actual intellectual gain coming from the discussion.
Here are the facts regarding this matter:
1) Unvaccinated people are not a protected class. FL has EO21-81, which states the following: "Businesses in Florida are prohibited from requiring patrons or customers to provide any documentation certifying COVID-19 vaccination or post-transmission recovery to gain access to, entry upon, or service from the business". Meaning from a legal perspective, as a business, you can't ask about their vaccination status, but if you find out someone is unvaccinated in some other way, there's no legal protection for these individuals from eviction based on their vaccination status. Whether or not this landlord counts as a business is debatable (I would argue that yes, he is in fact a business).
2) This is not a HIPAA violation. I would really appreciate it if people stopped contributing to this misunderstanding. HIPAA only prohibits the release of protected health information (PHI) by others without your consent. Barring other laws (such as EO21-81 in FL which states that businesses in FL are not allowed to force people to provide documentation of vaccination), your employer or your landlord can in fact ask you whether or not you are vaccinated. In other states that don't have things like the FL EO, they can fire you for being unvaccinated. This is not against the law.
3) Is this smart business? No, as only about half of FL is vaccinated. It's never smart business to remove half your TAM just to support your political beliefs. Should you personally give a **** about this guy's decision? NO! Get back to your own business and spend less of your time on things you can't control (politics) and more on the things you can.