Islamic State group claims Ohio State University rampage per BBC News who miss a key fact

This BBC report http://www.bbc.co.uk/news/world-us-canada-38151669 includes analysis from Gordon Corera that omits the news that the perpetrator of the Ohio attack said this:

"By Allah, we will not let you sleep unless you give peace to the Muslims. You will not celebrate or enjoy any holiday," he wrote before the attack. "Btw, every single Muslim who disapproves of my actions is a sleeper cell, waiting for a signal. I am warning you Oh America."

Presumably this attack is still 'nothing to do with Islam' so far as the BBC are concerned.