FWIW: Alex Jones of InfoWars says that the event did happen. He says his sources say that the shooter had Antifa literature in the room and that he fired on the authorities who blew open his door and they shot him. He notes that the reports that he converted to Islam and that the ISIS claim of responsibility has merit though it has not been confirmed.
The fαℓѕє fℓαg aspect of the event is the possibility that it was orchestrated by the political left and has the purpose of blaming the political right--which, of course, is going to happen.