As would Serbs. Does the patriarchate of Rome need to be entangled in a dispute between Croats and Serbs?
If the Croats feel so strongly they can promote his local cult. Otherwise maybe it would best for the patriarchate of Rome to wait a century, after more neutral or "fair and balanced" histories have been written about the Balkans.
Crisis: Aloysius Stepinac: Hero, Martyr, Saint by Matija Štahan