What’s the point of committing an act of Jihad if it’s all symbolic and no one knows why he did it?
Because a reaction against a clearly stated Jihad would probably not be the one he was hoping for. If we are busy fighting each other an following trails of false blame how much easier is to for real enemies to slip right by? Part of terrorism is keeping a population in a state of fear. He also just plain wanted to kill people and if any political motive most likely came second to his desire for infamy.
I do see where his dad is Irish so he probably did have a valid interest in the IRA but I do think there is more to it. Mostly because of one of the persons listed as a connection on that page.
So I don’t necessarily believe there is a clear cut single reason for his act. But I sure as heck do not believe a Pagan, Wiccan who was a Conservative Republican who was interested in The Left Hand Path is who the shooter really was.