[Zigûr]

I was going to post this in the Sauron's Great Miscalculation thread but as I feel I've already contributed sufficiently to going off topic there, I've reworked this to fit this topic more closely.

Orcs and spirituality
Professor Tolkien observed the possibility of Orcs considering Morgoth to be their 'father', in a spiritual sense, but this was blasphemous and spiritually deleterious: "Any creature that took him for Lord (and especially those who blasphemously called him Father or Creator) became soon corrupted in all parts of its being" (Morgoth's Ring). This also suggests that it would take many generations for Orcs to even begin to mingle with Mannish society, as Gondor after the restoration of the King appears to have also resulted in the restoration of what constituted their religious practices, as stated in Letter 156. The Orcs, deluded about their spiritual origin, would not have been an easy fit into this society, and I imagine it would have only occurred in days when, I assume, the fortitude of the Númenóreans in Middle-earth again waned, as it appeared to already be doing late in Eldarion's reign if The New Shadow is any indication, and by extension I imagine the worship of God again faltered, as it had in the king's absence.