We will never know precisely why a 29-year-old American went to a gay nightclub in Orlando, Florida, and started shooting people. It was a hate crime, obviously, but was it driven by more than homophobia?
The man was the son of immigrants from Afghanistan, he had sympathies with Isis and reportedly pledged allegiance to the "Islamic State" in a 911 call he made from the nightclub. His former wife says he was mentally ill.
If he must be called a "terrorist" he seems a particularly solitary one. There was no co-ordinated action, as there has been in Paris and Brussels, no suggestion of a jihadist cell in Orlando.
He had previously expressed sympathy for a suicide bomber, which caused him to be interviewed by the FBI in 2013 and again in 2014, but obviously the bureau did not consider him dangerous enough to warrant surveillance. After he was killed by police in the nightclub where 50 people lay dead and another 50 or more had been injured, a message was posted on a jihadist website calling the attack the work of "an Islamic State fighter". But it would say that.
How easy it becomes for Isis to gain an inflated image of global importance from what are probably random acts of deranged individuals who invoke its name for their own sense of self-importance.