Hold on!
I found myself wondering about Mercola’s religion. Here is in part what one article said about his religious beliefs:
“When symptoms arrive as a result of how poorly you’ve neglected your body and mind, rather than taking personal responsibility for your own wellness (restoring wholeness) and trusting in the God-given recuperative powers of your body, many seek those who are now only too willing take on this role for you.”
Mercola was raised as a Catholic. Later in life he switched to evangelical Christianity, but now calls himself spiritual rather than religious. Dr. Mercola was formerly a member of the Christian Medical Society but stopped his membership in 2002. He promotes religion and prayer as having health benefits, and focuses strongly on studies that advocate this position.
Mercola hosts the theistic writings and beliefs of other website contributors such as Carol Tuttle,[4] who speaks of angels among us,[5] that want to help everyone…
Source: https://www.bionity.com/en/encyclopedia/Joseph_Mercola.html
I’m not sure if his religious beliefs influence him, or if it’s him and he “speaks to” people with similar beliefs. There is no denying the religious right is hearing a lot of the same information simply because they talk to each other like any group. Hence the Bible Belt reluctance for covid vaccinations. I do not mean religion itself is anti-vaccine, it’s not the religions, it’s just who is listening to people like Mercola.
Another website basically credited him with the greater anti-vax movement, although I think he is only part of it.