There was, though, a problem with people whose religion excluded the veneration of other gods - especially the Jews and the Christians. The Romans tended to view this as rebellion, and so it resulted in many conflicts arising from often unintended offenses, like putting a statue of an emperor in a prominent place in Jerusalem which resulted in a public revolt. Similarly difficult to understand for the Roman mindset was the attitude of Christians who rather chose torture or death instead of offering a little incense to the Roman emperor. From the Roman view, the refusal to venerate the Roman emperor was political treason.
The edict of Milan which decreed tolerance of Christianity was followed by a time of parallel existence of Christianity and paganism which was, though, far from an actual religious pluralism - the religion of the emperor was always at an advantage, and the Arianism|[[Arian, Trinity|trinitarian ]] and pagan emperors in the fourth century saw it as perfectly legitimate to take measures against religious leaders who did not share their belief. By the fifth century, the western Roman Empire had crumbled, but the same patterns of behavior continued in the Gaul, Celtic, and Germanic kingdoms that replaced it.
