TRUMP made it extremely political during covid, and all the anti-vaxxers that were originally on the "hippie" side of the left went to alt-right wing. besides it was the movement jumpstarted by Jenny mccarthy and her husband convincing midwestern moms in the 2000s that it cause autism they took it and ran with it.(apparently i dint see anything after 2015, so they mightve stopped doing it"

I'd say it started out as a troll, Poe's law took hold, and now it's used as yet another dividing tactic so Republicans can swindle half the country into ignoring the abuse by the ruling class.

Because the proponents try to work through all means, including political, to spread their idiocy.

A capable government would mandate a basic set of vaccines, with medical exceptions only, and those only with a second opinion from a limited list of specially accredited specialists.

It's not political per-see, these are ideological extremist.