This is probably because Zelensky just banned one of the Ukrainian Orthodox churches in Ukraine, the one that is know to have closer ties with Moscow.
Orthodox churches are very much based on nationality and ethnicity, and the “autocephalous” (self-headed) ones are often nothing but political organizations and they tend to split and multiply. There’s a lot of conflict between them.
I lived in an area of the US that had a lot of Ukrainian and other Orthodox churches, and there were three different Ukrainian ones. An Orthodox priest I knew said that his father in law, also a priest, had to keep a gun on the altar because there were literally attacks by these churches on one another.
Of course, it was all national (Ukrainian/Slavic) politics and had nothing to do with either Orthodoxy or the United States, which theoretically should have been their country at that point.
I don’t think Zelensky is even a Christian, so this is just another demonstration of the same-old, same-old.
The head of the Russian Orthodox Church, Patriarch Kirril,Considers Putin’s invasion of Ukraine to be a holy war for Russia.
I don’t blame Zelensky for banning the church.