Because this is an out group constantly endangering the well-being of others? It really is one. Or if it isn't, then what exactly is it? Your body, your choices, your consequences, but not mine or anyone else's.
Why is the right to dodge vaccination and masks so important, so absolutely vital, so incredibly on target that we risk the destruction of the Republic itself if we mandate them? Do you also support my right to throw hand grenades into rooms full of people I don't like?
This nation was founded during a smallpox and variola academic where our founding father George Washington forced vaccination upon his soldiers (1). But mandating vaccination against the current pandemic is unamerican? How does that work?