Michael Kimmel
Why is it always a white guy: The roots of modern, violent rage
He wrote an entire book about how the decline of white male power makes these guys angry. Even though most of them are too young to remember white male dominance...
The fact is, caucasians are genetically much more likely to suffer from streptococcal infections. And sugar consumption is at an all time high. And young men are notorious about avoiding seeking health care unless their eyes are bleeding...
Holmes exhibits symptoms of Tourettes, most of the rest show symptoms of trigeminal neuralgia.