The anti-imperial omninationalist position is a very old one in Christian circles.
Let them ask, then, whether it is quite fitting for good men to rejoice in extended empire. For the iniquity of those with whom just wars are carried on favors the growth of a kingdom, which would certainly have been small if the peace and justice of neighbors had not by any wrong provoked the carrying on of war against them; and human affairs being thus more happy, all kingdoms would have been small, rejoicing in neighborly concord; and thus there would have been very many kingdoms of nations in the world, as there are very many houses of citizens in a city.
Therefore, to carry on war and extend a kingdom over wholly subdued nations seems to bad men to be felicity, to good men necessity. But because it would be worse that the injurious should rule over those who are more righteous, therefore even that is not unsuitably called felicity. But beyond doubt it is greater felicity to have a good neighbor at peace, than to conquer a bad one by making war. Your wishes are bad, when you desire that one whom you hate or fear should be in such a condition that you can conquer him.
– St. Augustine of Hippo