Several.
Cognitive dissonance & confirmation bias - "I have a position, therefore I will seek out information to confirm it, and try to influence others."
(I thought there was a stance on INGO to let everyone decide for themselves. But here is, "the vaccine is evil, tell everyone!")
There are people genuinely convinced it's a nefarious plot for control. In that case I can't fault anyone for trying to get people to not take the vaccine.
I mean, if you were convinced soylent green is people, wouldn't you try to tell others and convince them not to eat it?
In some cases, it's pure power - "We're so powerful we can make be get a vaccine!"
"Oh yeah? We're so influential we can convince them it's poison!"
Your best post yet. Completely proves you have no understanding of what is really going on.