We would expand this by adding that conspiracism not only identifies and blames elites, but also identifies and blames subversives and parasites from groups that have relatively lower social or economic status. With the collapse of communism in Europe, hard right conspiracists in the US turned their attention to subversives inside the government, as they had during the McCarthy period. Let's assume the Oklahoma City federal building was blown up to protest the government misconduct, excessive force, and abuse of power that were evident in the attacks on the Weaver family at Ruby Ridge, Idaho and the Branch Davidians at Waco, Texas. In several hard right and far right scenarios, Ruby Ridge and Waco were pre-planned conspiracies by government officials to create an atmosphere where the government could justify taking away guns from average citizens in preparation for imposing martial law and eventually establish UN control. Far more likely is that it was an act of terrorism designed to not only punish a government seen as illegitimate, but to move the Militia movement further to the right ideologically, and to push the Militia movement from defensive armed dissent to agressive armed revolution to topple the government.
Terrorists see themselves as heroes.
They act while others talk. They are convinced that their violence will provide the spark for an uprising aimed at throwing off the yoke of oppression. They expect others will quickly join them, and that history will record their deed as noble and justified. They are wrong, and their acts are despicable, but their acts usually have an internal logic. So the bombing of the Oklahoma City federal building was most likely carried out by some person or persons allied with the far right in the US, perhaps with ties to the neonazi underground, Ku Klux Klan, Aryan Nations, Christian Identity, or the Christian Patriot movement.