When Dylann Storm Roof walked into the Emanuel African Methodist Episcopal Church in Charleston, South Carolina, he joined the Bible-study class before gunning down nine African-Americans as they prayed.

Roof still communicates with his admirers on the outside. In jail, he began exchanging letters with a man in Arkansas named Billy Roper. A former schoolteacher and the son and grandson of Klansmen, Roper leads the Shield Wall Network, a group of several dozen white nationalists who organize rallies and conferences — often collaborating with neighboring hate groups — with the goal of building a white ethno-state. “I have a lot of empathy for him. I’m 47, and he’s young enough to be my son,” Roper said of Roof when interviewed recently for this project. “These millennials and now, I guess, Gen-Zers that are coming up, they are not stupid about the demographic trends and what they portend for the future. That angst, that anxiety that plagues them, drives them to do rash things — whether it’s that rash or not — I can empathize with.” I would humbly suggest we believe that Roper is being sincere, and that he speaks for many.