The mandating part. We know that mandatory injections in North Carolina were used to sterilize black women. We know that mandatory injections in Israel were used to sterilize African immigrants too.

tl;dr: Mandatory injections are a gateway to a fascist eugenics program.

I'm all for vaccinations by personal doctors, and making them free, and opt in. But mandatory injections by the government get a fuck no from me, every time.