Were recent U.S. terror attacks fueled by online hate?

A downside to the Internet boom of the past two decades has been the growing presence of bigotry and hate online.The night five police officers were gunned down in Dallas, Texas, an extremist group called the African American Defense League posted this message online: "We must kill white police officers across the country."One of the group's followers was Micah Johnson, the Dallas gunman."People have more access to hate, and people feel more emboldened to project that hate," said Oren Segal, who