Double woah!
If that article is accurate, it's describing a deliberate campaign of entryism by that militia group, taking over community facilities and excluding other people. Also, standing for school boards and the like to get their foot in the door.
They might, of course, simply be participating in the democratic process wrt to the school boards. But as we saw with Trump, entryism is certainly the name of the game at the moment: people using democratic or "good faith" mechanisms to get their first foothold in power... and then breaking the democratic mechanism in order to stay there.
One to watch. 