The great illusion is that somehow the old imperialist ways can be married to the Gospel of the Prince of Peace as “Christendom” and produce the Kingdom of God. In the New Testament that Kingdom is described as “righteousness, peace, and joy in the Holy Spirit”, the “peaceable Kingdom” where justice and mercy kiss each other and oppression and violence are banished for ever. The early Christian witness to their persecutors was “see how they love one another” not how they condemn and slaughter one another, let alone the unbelieving pagan masses.
…by the end of the Fourth Century CE, the Imperial Church had emerged full-blooded, while the original sense of Jesus calling His followers apart to follow a different path was far from lost among millions of his followers who looked with alarm on this heavy-footed march into full-blown political and social involvement of the most injurious kind for a movement supposed to lead people into the Kingdom of God rather than a holy-water-sprinkled repurposing of “Caesar-is-Lord” (even of the Church) as per the Roman (morphing into Byzantine by that point) model.
What the US brand of ultra-Evangelicalism most resembles historically is the fanatical Crusaders who believed that killing those who refused to accept Christ or opposed the preaching of His message was both just and essential if His Kingdom is ever to be brought into the world. There is none of the humility and self-understanding of being a fallible sinner that might even betray the Master that we find in the Apostles or the Apostolic and Post-Apostolic Fathers (and Mothers) of the ancient Church. There is no hint of the first believers who “turned the whole world upside down” and shook the foundations of the Empire itself by turning the other cheek, turning back to be crucified with his people, as Peter did, or heading to Rome to face the Emperor himself even if it meant death, as Paul did. There is no hint of “love your enemies, do good to those who hate you and persecute you, and so you will prove yourselves to be the children of your Heavenly Father”.
The coming together of the Cosmic “evil one” and the human propensity to seek our own aggrandizement at the expense of everyone and everything else typically and periodically produce especially monstrous eruptions that leave the whole world reeling and the human race lying in a shambles. Shifting the blame, we point the finger at God as if the Deity is responsible for allowing us to behave demonically rather than exercising His omnipotence to prevent such horrors. The Accuser laughs all the while from behind the Oz-Curtain, and we fool ourselves that we are justified because God doesn’t just cut evil out of our hearts and kill the most monstrous perpetrators.