An article in the U.K. broadsheet newspaper, The Daily Telegraph, dated 16 April 2022, by Charles Moore (former editor of said paper) said this about Vladimir Putin and Kirill, Patriarch of Moscow:
One of the many distressing features of the war in Ukraine is the way the aggressor invokes the Christian God. Vladimir Putin is dishonourably abetted in this by Kirill, Patriarch of Moscow, who praised President Putin’s “high and responsible service to the people” just as the invasion began.
The article referred to the presence of Vladimir Putin at the Easter Eve Mass in Moscow in 2021:
On that occasion, he held a candle, crossing himself and sitting alone in a high place, far distanced from the rest of the congregation, in order to emphasise his eminence and decrease his chance of Covid infection.
That partial quote presents a view of how some Europeans perceive the relationship between the President of Russia and the Patriarch of the Moscow Orthodox Church. But is this view justified?
According to the following quotes taken from a Wikipedia article, it seems that the leader of the Russian Orthodox Church approves of what is going on in Ukraine.
A close ally of Russian leader Vladimir Putin, Kirill has described Putin’s rule as "a miracle of God." According to Putin, Kirill's father baptized him. During his tenure as Patriarch of Moscow and all Rus', Kirill has brought the Russian Orthodox Church closer to the Russian state. Kirill's relationship with Bartholomew I of Constantinople, Ecumenical Patriarch and the spiritual leader of the Eastern Orthodox Christians worldwide, has been tense. After Kirill lauded Russia's 2022 invasion of Ukraine, clergy in other Orthodox dioceses condemned Kirill's remarks, with Bartholomew I saying that Kirill's support for Putin and the war were "damaging to the prestige of the whole of Orthodoxy." https://en.wikipedia.org/wiki/Patriarch_Kirill_of_Moscow
Another section in the same Wikipedia article provides details of Kirill's support. Here are a few examples:
Kirill approves of the invasion, and has blessed the Russian soldiers fighting there. As a consequence, several priests of the Russian Orthodox Church in Ukraine have stopped mentioning Kirill's name during the divine service. The Moscow patriarchate views Ukraine as a part of their "canonical territory". Kirill has said that the Russian army has chosen a very correct way. Kirill sees gay pride parades as a part of the reason behind Russian warfare against Ukraine. He has said that the war is not physically, but rather metaphysically, important.
On 6 March 2022 (Forgiveness Sunday holiday), during the liturgy in the Church of Christ the Savior, he justified Russia's attack on Ukraine, stating that it was necessary to side with "Donbas" (i.e. Donetsk and Luhansk People's Republic), where he said there is an ongoing 8-year "genocide" by Ukraine and where, Kirill said, Ukraine wants to enforce gay pride events upon local population. Despite the holiday being dedicated to the concept of forgiveness, Kirill said there can't be forgiveness without delivering "justice" first, otherwise it's a capitulation and weakness. The speech came under international scrutiny, as Kirill parroted President Putin's claim that Russia was fighting "fascism" in Ukraine. Throughout the speech, Kirill did not use the term "Ukrainian", but rather referred to both Russians and Ukrainians simply as "Holy Russians", also claiming Russian soldiers in Ukraine were "laying down their lives for a friend", referencing the Gospel of John.
On 9 March 2022, after the liturgy, he declared that Russia has the right to use force against Ukraine to ensure Russia's security, that Ukrainians and Russians are one people, that Russia and Ukraine are one country, that the West incites Ukrainians to kill Russians in order to sow discord between Russians and Ukrainians and gives weapons to Ukrainians for this specific purpose, and therefore the West is an enemy of Russia and God.
In a letter to the World Council of Churches (WCC) sent in March 2022, Kirill justified the attack on Ukraine by NATO enlargement, the protection of Russian language, and the establishment of the Orthodox Church of Ukraine. In this letter, he did not express condolences over deaths among Ukrainians.
Representatives of the Vatican have criticized Kirill for his lack of willingness to seek peace in Ukraine. On 3 April, the former Archbishop of Canterbury Rowan Williams said there was a strong case for expelling the Russian Orthodox Church from the WCC, saying, "When a Church is actively supporting a war of aggression, failing to condemn nakedly obvious breaches of any kind of ethical conduct in wartime, then other Churches do have the right to raise the question ... I am still waiting for any senior member of the Orthodox hierarchy to say that the slaughter of the innocent is condemned unequivocally by all forms of Christianity."
More information here: https://en.wikipedia.org/wiki/Patriarch_Kirill_of_Moscow#Support_for_the_Russian_invasion_of_Ukraine,_2022
“Bad men need nothing more to compass their ends, than that good men should look on and do nothing.” (English philosopher John Stuart Mill, 1860's) "Have nothing to do with the fruitless deeds of darkness, but rather EXPOSE THEM" (Ephesians 5:11)
By failing to condemn this genocide and the war crimes being perpetrated by the Russian army, Kirill, the leader of the Russian Orthodox Church, will be held accountable before God. That principle holds true to every person involved, not just one individual. It also applies to the whole world, whether Christian or not (Romans 3:19). "Each of us will give an account of himself to God" (Romans 14:12).
What sort of Christmas will it be for families whose lives are at risk and who don't even have access to heat, water or even shelter? What sort of a Christmas will it be for Russian families whose sons have died in this war?
Love came down at Christmas, but it will take divine intervention for Ukrainians to feel love, peace and security any time soon. Meanwhile Christians throughout the world pray for an end to the suffering and bloodshed.