“They” are not stupid (don’t be so kind). They are amoral and evil. They know full well what they know and what they are promoting.
I don’t dispute that there are evil people being the vaccines, including the boosters.
However, I do think some of their followers are stupid and not evil per se. I would include as followers, medical directors at hospitals who uncritically go along with government directives.
Self-deluded perhaps is a better descriptor than stupid.
Are the self-deluded evil? Perhaps an argument can be made.