By Owen Gleiberman According To The variety There’s a scene in “The Order,” a riveting and explosive docudrama about the dawn of the modern American white-supremacist movement in the 1980s, that creeps you out in a very eye-opening way. Two leaders of the movement are meeting on an isolated country road in Idaho. One of them, Richard Butler (Victor Slezak), is the white nationalist who founded the Aryan Nations, the neo-Nazi cult that has its compound nearby. He’s a racist extremist, but he has the demeanor of a courtly preacher, and he’s consciously political about the growth of his movement. The other man, Bob Matthews (Nicholas Hoult), is a former follower of Butler’s who has split off from him, all because he thinks the Aryan Nations movement isn’t extreme enough. Matthews w...