If you truly think this point of view is the right thing, consider replacing the word "vaccination" with "war". e.g. "Is your claim that moderate voices are causing people to hurt the war effort? If that is the case maybe silencing them isn't a bad thing".

If you allow corporations and governments to censor reasonable and moderate opinions at this juncture don't be shocked when it's used in the future in a context that you don't like, when a sufficiently large surveillance and technological state leaves you powerless to do anything about it.