Muuch of the national debate over racism in the aftermath of last month’s mass murder in Charleston, S.C., has focused on the South and its strange and sometimes jarring nostalgia for the Confederacy. And yet tucked away in the Pacific Northwest of the United States is a vicious group that most people have never heard of but the nation’s most virulent online racists know well (among them, accused South Carolina murderer Dylann Roof, who wrote about the group in his now-infamous “manifesto”). The group is called the Northwest Front and its final solution to the race "problem," if you will,...