That is because the feral government does everything it can to delegitimatize such groups. If we still had a Free Republic, such groups could be organized in conjunction with state emergency management and other similar things to help backstop local police, national guard, and others. Instead, the feral arms of the government does everything they can to stigmatize citizens who might wand to band together collectively for local defense of whatever kind needed.
I’d be very surprised if this militia doesn’t already have a couple lower key informants.
https://www.washingtonpost.com/archive/local/1995/04/27/va-hunt-club-was-aiming-to-battle-government-us-says/8e9d5355-442a-433c-8ba3-a11f4fca2187/