http://internet-haganah.com/harchive...91.html#007191

The Frankfurt shooter's Facebook page, and a little color commentary

The jihadi who shot four US service members in Frankfurt yesterday, killing two, left behind a Facebook account and 127 friends.

The shooter, Arid Uka AKA Abu Rayyan, may have acted alone. He certainly was the only person on the scene with a gun, shooting and killing. His radical associations online should put to rest any thought that he was a genuinely unconnected lone wolf.
Is it possible that Uka had no significant meat space contact with any violent Islamist supremacists?

Could Uka have convinced himself of the righteousness of killing American airmen based solely on what he saw on the internet?