The anti-vax bullshit crosses many lines. Its hard to pigeon hole, but there seems to be a concerted effort by the right to reach out to them now as another angry group to be exploited.I wonder what his religious affiliation is? Being right wing I'd assume Christian but I've been noticing that anti-vaxx, flat earthers, etc. tend to be atheist, agnostic, or not actively involved enough in their religion to be considered strong adherents.
It's almost like human beings HAVE to believe in something bigger than themselves, even the outlandish, and attempt to propagate it in order to feel important or valuable. Absent religion these conspiracy theories are logical replacements.