The horrible mistake of the Pittsburgh shooter and those who think like him is that he has lost sight of this undeniable fact of human existence: There is no us and there is no them. We are one. We are human beings, with intelligence and compassion and humor and fear and drive. While we are seemingly stuck with some hatred in our midst, we also are able to choose to recognize our shared humanity, to see ourselves in the stranger and the stranger in us. We can give people a chance at a better life, whether they are born in Philly or Aleppo or Tegucigalpa, in Keren or Kuringu or Khartoum. America is a place that people go when they have nowhere else. That cannot be erased by a bloody morning in Pittsburgh.