I'm talking about present day people. And not some religious group, actual ideology.
IIRC some libertarians tried to create new microcountries at sea to be left alone back in maybe the 70s. 1 was an aircraft carrier that sank with no FEMA and the other was an artificial sandbar they constructed in the Pacific. Since they didn't believe in a military I wanna say Tonga or maybe Tuvalu invaded and took it over.
But yeah, if a right militia did this Janet Reno would have already scattered their ashes and gotten back to deporting screaming, DREAMer refugee kids back to Cuba at gunpoint.