Since the time of the Emperor Constantine the Church has cosied up with nationalism. It sees it as a close cooperation between the Church and the State and calls it "synergy." The Church has always been the bearer of the national culture. It worked very well - a combination of Patriarchs and Monarachs for 1600 years. Much weakened now since the early 20th century. The Russians appear to be re-establishning a form of it.