They never learn.
They could be anyone, but usually "they" are those preying on the rest. In this case an Food & Drug Administration employee (no idea what this dude does) goes full Nazi insisting on whatever method is needed to force people to get vaccinated.
I have posted three clips...the original undercover interview, the effort to get the FDA employee to explain himself, and a response from a member of Congress over the first video I posted here.