I hate blaming things on social media, but I think that's at the center of it.

Once you start pausing on anything related to anti-vax or anti-science, you'll start seeing more and more people talking about alternative views.

And soon those alternative views are all you see, and those alternative views start feeling like mainstream views. And then you become confused when you're at a dinner party and no one agrees with your stance on vaccines.

I don't think it's any more complicated than that.

And it doesn't help that anti-vax views are spread with the support of bogus science. Anti-vaxxers don't view themselves as anti-science.