Churches support not only the war in Ukraine, not only Russian and not only at the present time. The churches of the whole world for centuries supported the wars of empires and states and died with them, but the Church of Christ is still alive.
The main temple of the Armed Forces of the Russian Federation near Moscow became a military symbol of the war for the Russian Orthodox Church. A temple to the worship of blood and violence, the worship of tyranny, a monument to the aggression of the Kremlin, where the main characters are: Stalin, Putin and Jesus. War is ideas and weapons. Weapons are supplied by the aggressor state, and ideas by the church. Why did it happen that many churches began to support the war? See video at the link