That Mussolini wished to conquer Abyssinia is well known; that Italy's Catholic Church also sought the eradication of the venerable Ethiopian Orthodox Church is not.
Ian Campbell is an independent scholar and international consultant. He has written several books on the Italian occupation of Ethiopia, including The Addis Ababa Massacre: Italy's National Shame, also available from Oxford University Press. It was a Financial Times History Book of the Year (2017), and has been published in Italian translation.