He could have been radicalized and the media will just use his Anglo name.
If his motive was one that we assume, the media will bury the story
On this one, it may not be Islamist.
As joshhiggins said, it might be follower of Joseph Kony? Real nutter.
—
If you read the Wiki about that group, they have some similarities to ISIS, promote sex slavery and genocide. Weird?
https://en.wikipedia.org/wiki/Joseph_Kony