Calling a lunatic disgruntled ex employee a Jihadist in contradiction of the authorities who actually investigated the incident is not proof.
Actually he was a both a disgruntled employee and a Jihadist. The FBI is currently investigating because of the Jihadist link. They suspect he may be a Lone Wolf rather than associated with an organized terrorist group. Lone Wolves are the FBI category for terrorists who commit terrorist acts on their own without the support of a larger organization but with the same intent.
He was a recent convert to Islam and attended the local Mosque. While for the most part the Mosque is normal, there are rumors that a small Islamist faction attends there as well and recruits disgruntled angry young men from the worshippers. While not terrorists precisely they teach this cadre of young men "real Islam" including teachings on the Dhimmi (how Muslims should treat Christians: Christians lack right of Muslims, pay extra taxes, etc etc). His Facebook page is full of the usual Jihadist rhetoric one would expect from a Lone Wolf terrorist. He also had been trying to convert co-workers without success and a great deal of his anger stemmed from that lack of success.
On the workplace violence side, he was recently fired.
He actually survived the bullet so unfortunately we'll have to pay a small fortune to try him before Oklahoma can execute him. On the bright side, the FBI behavioral sciences unit will have several years to troll through his head examining his motivations. I suspect they will eventually find that it was a combination of Jihadism and workplace violence. Human emotions are complex things and people often do things for more than one reason.
