You can murder nine people at a black church and still not be called a white terrorist:
This is the privilege of whiteness: While a terrorist may be white, his violence is never based in his whiteness. A white terrorist has unique, complicated motives that we will never comprehend. He can be a disturbed loner or a monster. He is either mentally ill or pure evil. The white terrorist exists solely as a dyad of extremes: Either he is humanized to the point of sympathy or he is so monstrous that he almost becomes mythological. Either way, he is never indicative of anything larger about whiteness, nor is he ever a garden-variety racist. He represents nothing but himself. A white terrorist is anything that frames him as an anomaly and separates him from the long, storied history of white terrorism.