This is a facile and offensive argument. Non-atheists are not the intellectual equivalent of Holocaust deniers or antivax advocates. All you're doing is inviting religious flamewar, which is not allowed on HN.
Apologies if it was perceived this way. But I don't see how my comment link non-atheists with Holocaust deniers? My point is: Some people are going to believe things which are wrong (from your perspective) and that can happen at large scales. There are extremes (like flat earth) or socially-emotionally driven (like religious believes).
I say give anyone the freedom to have any opinion as long as he doesn't incite violence or act on it.
For antivax it is really a complicated one. I don't have a problem with antivax advocates but I have a problem with parents that don't vaccinate their kids. And I think the government should act on the best interest of its minor citizens.
I'm sorry I misinterpreted you. My reaction to Holocaust deniers and, come to think of it, to antivaxxers is visceral, and I saw an equivalence argument that wasn't really being made. I'll work on being less jumpy!