Not sure what you mean, Silenus. The Byzantines fought like crazy against the Latins, they didn't just let them swan in like they owned the place. Yes, Christians have occupied the countries of others, that doesn't necessarily mean that it was right, or condoned by Christianity. My point was that Christianity does not command open borders as a moral imperative, as I'm sure you would agree. The morality of various Christian vs. Christian wars, and Christian vs. Pagan conflicts, are certainly interesting, but really beside the point in this context. For what it's worth, Christianity has always recognized the right of self-defense to a people, even pagans. Fr. Vitoria, in his writings on the morality of war against Indians in the New World, even denied that a Christian people had the right to conquer and occupy a pagan people, just because they were pagan. So, if you know any Prussian pagans who would like a word, tell them that I am at their disposal...