Commentators such as Roissy have come to the same conclusion I have. Asian males are not masculine (I've had more than one Asian female tell me this) so in America they certainly can't get white women, and Asian women prefer white guys. So they end up utterly alone, hairless wimps with no muscles or height, and go crazy like that nut in Virginia a few years ago, and the one certainly who was looking for a female administrator to blow away.
These shootings are going to happen more in the future. When people feel humiliated they are always going to seek revenge.