I haven’t detected mockery of Catholicism as such in THE BORGIAS. Frank depictions of the decadence and corruption of the Renaissance-era Vatican and the more or less standard sexploitation that’s a feature of most every cable show, yes, but not mockery of Christian belief or honest practice per se. If I’m wrong I stand ready to be corrected.
My b-i-l is a priest, and he’s really enjoyed watching “The Borgias”. They defied the teachings of the Church in their actions, so telling it like it was with those folks isn’t necessarily ‘Catholic bashing’.