[Cronos]

While he stated his allegiance to the Islamic state (let's not refer to it as ISIS -- it has expanded beyond Al-Sham (Syria) and Iraq) there is no indication that he was directed or given any kind of instruction by the Islamic state

What does this mean?

It means that any Sunni Moslem can be turned to killing in the name of Islam, inspired by the re-creation of the Caliphate. This means that any Sunni Moslem -- even, probably especially a new convert (can be a blue-eyed blonde convert or a black or a Chinese or a native American) will kill in the name of the IS.

There is no way to guard against this philosophy by profiling -- while you can profile an Arab, the IS may prompt a Swedish convert or a Japanese or Chinese or Nigerian to do the deed. The all-American looking boy next to you may turn out to be the perpetrator next time

[Innovative]

Islamic State has been encouraging “lone wolf” attacks for some time. So they are responsible.