"true Christianity and Paganism are not incompatible - Christianity was Pagan before the Romans hijacked it for their own political ends." (karnstein)
I think you will find it was Rome who "paganised" Christianity from the fourth century onward instead of pagan Rome becoming "Christianised" under Constantine.
The Roman Catholic Church derived its secular power from Contantine who was hailed as the first Christian Emperor. His adoption of Christianity did not prevent his own deification after death, nor the murder of his son and second wife. There were many others who Constantine murdered, or executed, including his rival, Licinius.
None of these deaths, at any time in any society, can be excused. He clearly had no comprehension of the teachings of Jesus Christ and even the Roman Church became uncomfortable about Constantine's death-bed baptism at the hands of the Arian heretic Eusebius of Nicomedia, and invented a story that he was baptised by Silvester I of Rome. However, Nicomedia was not in Silvester's diocese and at the time of the emperor's baptism Silvester had been dead for two years.
The Romans making Christianity a state religion witnessed ambitious churchmen clambering upon each other in an endeavour to gain power. They became paganised in the wake of Constantine and persecuted gentler Christians discovered when Rome turned its gaze toward British shores in 597.
The "rotteness" of the Roman Catholic Church was at the heart of Martin Luther's attack on it in 1517 when he wrote the "95 Theses" thus sparking off the German Reformation. At the start of the sixteenth century, the Roman Catholic Church was all powerful in western Europe. There was no legal alternative. The Church of Rome jealously guarded its position and anybody who was deemed to have gone against it was dealt with harshly, frequently resulting in their death. The Roman Church did not tolerate any deviance from its dogma and teachings. But were these teachings Christian?
A Christian cannot be certified as such unless what they believe derives from Christ. For example, Our Lord did not appoint Peter to the headship of the apostles and in Luke 22: 24-26 expressly prohibits ideas of this kind. The Roman Church of recent centuries nevertheless made Peter "prince" of the apostles due to her alteration to the original meaning of the words: "Though art Peter and upon this rock I will build My church."
None of the Church Fathers made the connection between Peter and the Bishop of Rome, as does the Roman Catholic Church, and for them it was Peter's Faith - or Christ in whom Peter has Faith - which is called the rock, not Peter.
All the Church Councils in the first fifteen centuries agree that Jesus Christ is the only foundation or rock on which the Church rests.
What we witness in modern churchianity with its subscription to the pagan concept of a "just war" is about as far removed from the teachings of Christ as you can get, which might explain why many of these churches have introduced "multi-faithism" and include Freemasons among their clergy. To rediscover pure Christianity you would need to go back to the apostolic church prior to Rome's hijacking of the faith when the Emperor Constantine adopted "Christianity" which resulted in his title "Pontifex Maximus" being assumed by every pope. Previously Christians would neither be allowed, nor want to be, in the army. In 416, however, by an edict of Theodosius, only "Christians" were allowed to enlist.
The early Church in the Apostolic Age had a profound sense of the sanctity of human life. Shedding blood was a grievous sin. After Constantine defeated Maxentius at the Milvian Bridge in 312, so-called "Christians" ceased to be pacifists and beat their ploughshares into swords.
