As anyone who knows me might guess, I am significantly further to the right than the Orthodox faculty at Fordham (and most likely any of the original signers of this document). That said, I think their fundamental point is correct theologically, morally, and politically when they say:
The Russian invasion of Ukraine on February 24, 2022, is a historic threat to a people of Orthodox Christian tradition. More troubling still for Orthodox believers, the senior hierarchy of the Russian Orthodox Church has refused to acknowledge this invasion, issuing instead vague statements about the necessity for peace in light of “events” and “hostilities” in Ukraine, while emphasizing the fraternal nature of the Ukrainian and Russian peoples as part of “Holy Rus’,” blaming the hostilities on the evil “West”, and even directing their communities to pray in ways that actively encourage hostility.
The support of many of the hierarchy of the Moscow Patriarchate for President Vladimir Putin’s war against Ukraine is rooted in a form of Orthodox ethno-phyletist religious fundamentalism, totalitarian in character, called Russkii mir orthe Russian world, a false teaching which is attracting many in the Orthodox Church and has even been taken up by the Far Right and Catholic and Protestant fundamentalists.
The speeches of President Vladimir Putin and Patriarch Kirill (Gundiaev) of Moscow (Moscow Patriarchate) have repeatedly invoked and developed Russian world ideology over the last 20 years. In 2014, when Russia annexed the Crimea and initiated a proxy war in the Donbas area of Ukraine, right up until the beginning of the full-fledged war against Ukraine and afterwards, Putin and Patriarch Kirill have used Russian world ideology as a principal justification for the invasion. The teaching states that there is a transnational Russian sphere or civilization, called Holy Russia or Holy Rus’, which includes Russia, Ukraine and Belarus (and sometimes Moldova and Kazakhstan), as well as ethnic Russians and Russian-speaking people throughout the world. It holds that this “Russian world” has a common political centre (Moscow), a common spiritual centre (Kyiv as the “mother of all Rus’’), a common language (Russian), a common church (the Russian Orthodox Church, Moscow Patriarchate), and a common patriarch (the Patriarch of Moscow), who works in ‘symphony’ with a common president/national leader (Putin) to govern this Russian world, as well as upholding a common distinctive spirituality, morality, and culture.
Against this “Russian world” (so the teaching goes) stands the corrupt West, led by the United States and Western European nations, which has capitulated to “liberalism”, “globalization”, “Christianophobia”, “homosexual rights” promoted in gay parades, and “militant secularism”. Over and against the West and those Orthodox who have fallen into schism and error (such as Ecumenical Patriarch Bartholomew and other local Orthodox churches that support him) stands the Moscow Patriarchate, along with Vladimir Putin, as the true defenders of Orthodox teaching, which they view in terms of traditional morality, a rigorist and inflexible understanding of tradition, and veneration of Holy Russia.
Since the enthronement of Patriarch Kirill in 2009, the leading figures of the Moscow Patriarchate, as well as spokespersons of the Russian State, have continually drawn on these principles to thwart the theological basis of Orthodox unity. The principle of the ethnic organization of the Church was condemned at the Council of Constantinople in 1872. The false teaching of ethno-phyletism is the basis for “Russian world” ideology. If we hold such false principles as valid, then the Orthodox Church ceases to be the Church of the Gospel of Jesus Christ, the Apostles, the Nicene-Constantinopolitan Creed, the Ecumenical Councils, and the Fathers of the Church. Unity becomes intrinsically impossible.
Therefore, we reject the “Russian world” heresy and the shameful actions of the Government of Russia in unleashing war against Ukraine which flows from this vile and indefensible teaching with the connivance of the Russian Orthodox Church, as profoundly un-Orthodox, un-Christian and against humanity, which is called to be “justified… illumined… and washed in the Name of our Lord Jesus Christ and by the Spirit of God” (Baptismal Rite). Just as Russia has invaded Ukraine, so too the Moscow Patriarchate of Patriarch Kirill has invaded the Orthodox Church, for example in Africa, causing division and strife, with untold casualties not just to the body but to the soul, endangering the salvation of the faithful.
You can read the whole document here: Public Orthodoxy.