I agree but I don't think this was a lone wolf incident. He had a house full of IED's, he had explosives inn his SUV and he had all sorts of people coming and going at his house. I believe he was a member of, maybe the leader of, a terrorist cell and the FBI better be on the hunt for anyone who visited this terrorists home.
Lone wolf terrorism is terrorism.
AT A MINIMUM, this was lone wolf terrorism. It could be more.
And check out his family in Chicago. What mosques did he attend?