The fact that it happened at all is disgusting, but the people involved made it even more disgusting, if that is at all possible. They were a mother and her son, a mother and her daughter, and two others, men, all white. Does the fact that they were white, and she was black, make it more heinous? Could it be more heinous? It is being called a hate crime, but isn't it always hatred that causes someone to inflict such harm on another human being? Perhaps, it is not always hatred of the person, but misdirected hatred of something else, that drives a person to such cruelty. The fact that they kept calling her a racially offensive name does indicate that it could have been a racially motivated crime.
Back in January of this year, in Knoxville, Tennessee, a young white couple were hijacked by three black men, and a black woman. They were brutally raped, and murdered --she was strangled, and he was shot, and his body burned, and left by the side of a railroad track. She was discovered inside the house where they were taken, inside a garbage bag. Was this a hate crime? I don't know. According to some reports, it was a random crime, and had nothing to do with race. The crime didn't receive a lot of media coverage, for some reason.
There will always be some kind of hatred in the world, as long as the world stands. Either because of race, or religion, a sense of injustice, or perceived injustices. When it comes to the victims mentioned here, and the senseless, and perverse, horror inflicted on them, in my mind, it comes down to one thing: pure, unadulterated, evil.