Yea, seemed on first glance a bit far out...especially as the Pope has made quite sensible noises about this war. I take it as reflecting a Russian Orthodox antipathy to the old Austro-Hungarian provinces of Ukraine: the source of the Banderism/Nazi problem with its old western Habsburg Roman Catholic allegiance.
After the Ukrainian Orthodox split from Moscow which can be seen in the light of de-Russification and the attempted Europeanisation of Ukraine (The Moscow Patriarchate was derided by Ukrainian nationalists as a Russian fifth column.), there is likely a suspicion that the (Western) Catholic church may be moving to take advantage on the coatails.