Christianity began well ... and ended in ...see below!
Christianity began in Galilee as 12 disciples of Jesus and then by many more as Followers of the Way. Only later were they called Christians - as a taunt.
Saul was converted and interpreted the death of Christ as atoning for the sins of the world, rather than the ultimate act of non-aggression and non-violence. A crucifixion that spoke volumes of the iniquity of capital punishment and, indeed of corporal punishment that was also used on this good man. Yet, both punishments are so beloved of the righteous of the Lord - and has been for centuries. They certainly don't believe in sparing the rod, because the Bible tells them so.
The Apostle Paul took Christianity to Asia Minor and Greece but it never became a philosophy, even though the intellectual Greeks loved to debate religion.
It went to Rome and it changed from being almost unheard of for Followers of the Way to enter the army, to it becoming acceptable to do so - and ever since.
It went to Europe and the rot really did set in. Non-aggression and non-violence became not just unheard of but completely non-existent amongst the supposedly faithful of the Lord. The words even, were never used such was the popularity of the soldiers of the Cross being literally warring crusaders against evil Islam and, even the wrong kind of Christianity! No longer were they faithful followers of the way of the Lord who taught and practised loving enemies rather than aggression and violence.
It came to America and that most devout nation; indeed, the nation with the mostest - the most of absolutely everything, including Bible believing, born again Christians. Yet, for the last six decades, along with its best buddy, the UK those most righteous nations have warred, have attacked, have invaded, have occupied nations with their godless and evil Communism. Only the tiny, Christian sects and branches of Christendom have been noted for their non-aggression and non-violence. Only they have remained true to the roots of Christianity and its Founder's 'unsuccessful' Way of non-aggression, non-violent direct action and of, literally loving those who have come to war, attack, invade and occupy.
The worst heresy, the ultimate irony and the final insult is the Bible reading and prayerful duo who launched the War of Terrorism against two Muslim nations who had done nothing to deserve the judgement of the righteous of the Lord from the US/UK. This Christian war or crusade against evil shows just how far the supposed disciples of the King of Love and the Prince of Peace have departed the Faith. They, who talk the most about defeating evil, need to first repent of their own much greater evil, methinks! There is the Jesus parable of the mote and the beam or, the splinter and the plank. Judgement begins in the House of the Lord - and, indeed on all who take the sword and the rod to punish the evil, sinful, rogue and failed nations of the world. Except, the US/UK/Israeli hegemony gets away with it. There is no judgement for their injustice, aggression and violence because they are all powerful - unlike their founder, Jesus Christ; all powerless, non aggressive and all failing!