The German's protected M.C. a large Catholic cathedral from the middle ages. They did not interfere or use it for military purposes because of an agreement with the Vatican. The Vatican also helped Nazi leaders to escape to safety after the war (O.D.E.S.S.A). Doesn't sound to me like the Nazi's treated catholics like jews.
It does, however, bring attention to the fact it wasn't just people of the Jewish faith who suffered.
It was the New Zealander Freyburg who arranged for this Catherdral to be destroyed by Air and Arty, he had convinced himeself and others that the Germans were using it as a obsevation post, this he convinced the higher ups after the Germans sent some trucks in to remove treasures over to the Vatican. After it's destruction the Germans of course used it for MG nests and everything else they could. I feel the vatican helped these people escape due to most Germans actually being Catholics. As far as this bishop is concerned he is way off, for a start the gypsy's were not wiped out, and the Nazi's if you got on the wrong side of them it did not matter what religon, or nationality you were, they just killed you off.