With hate in their hearts and guns in their hands, two teenagers opened fire at a California mosque on Monday. They killed three men before dying by suicide.One of those men, Amin Abdullah, a security guard at the Islamic Center of San Diego, was credited by police with preventing more casualties as terrified children huddled with their teachers behind barricaded classroom doors.Hours later, in response to a reporter’s question about the shooting, President Trump said, “It’s a terrible situation. I’ve been given some early updates, but we’re going to be going back and looking at it very strongly.”Trump hasn’t mentioned...