Technically there are never mask mandates by gov, but just 99.8% (I assume) of people wear mask.
So when the obedient Puritan people coming to this land. They are very cooperative in helping maintaining the community.
Through some indoctrination, they learned to stand up with their own wills. Turns out coins indeed always have 2 sides, right? When the individuals learn to stand up coercion with their own wills, they would stand-up against facial masks, vaccines, quanrintaines, etc.