Catholic Church in Croatia, the Vatican and the murder of the Croatian Jews

What were the attitudes of the Vatican and local Roman Catholic churchmen to the Ustasha murders of Jews in Croatia in World War II? The author ascribes to the Vatican a policy of "behind the scenes" pro-Jewish activity, and to local churchmen an ambivalent role: the leadership opposed in principle to the murder of Jews, the priesthood actually participating. The overriding consideration, for the Church, was fear of Russian Bolshevism.