There are very few groups I outright hate. Groups I dislike strongly, yes there are many, but viscerally hate? Very few.
Aside from Nazis, anti-vaxxers* are one of the groups firmly in the “I hate you with every ounce of my being” category. Not only are they stupid and selfish, but they’re willfully stupid and selfish in such a way that their stupidity affects the health and well-being of others around them. And now our dogs, too.
*I’m not talking about immuno-compromised people who want but can’t get vaccinations. If your doctor advises you against it, then don’t do it; I’m not talking about you (unless your doctor is Dr. Pepper or something). I’m talking about the idiots who believe Jenny McCarthy and Facebook over actual doctors.