|Name||Occupation||Possible influence||Speculation / circumstantial evidence|
|William Luther Pierce||White supremacist||FBI|
168 people died because an FBI program to surveil racists was a little too realistic for someone like Tim McVeigh. It's okay though — the FBI clears themselves of guilt in a 60 Minutes interview where Pierce denounces the bombing: "I do not approve of the Oklahoma City bombing because the United States is not yet in a revolutionary situation."
Note that sometime after the bombing, a false conspiracy was floated about an Iraqi being involved. This story was probably intended to discredit conspiracy theories of any kind, including perfectly truthful ideas about who influenced McVeigh in the first place.