Over the past two weeks, Americans struggled to make sense of tragic shootings that seemed disconnected at first glance. Anti-Semite James Von Brunn killed Stephen T. Johns, a black security guard at the Holocaust Museum. George Tiller's murder a few days earlier seemed to be about abortion, yet his shooter, Scott Roeder, also had roots in the racial purity movement. Yesterday, it was reported that the murders of Raul Flores and his daughter in Arizona were charged to three people with white supremacist ambitions.

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