"Part of the philosophy of today’s GOP, I think, is the notion that truth & error, right & wrong are knowable options, not exclusively as a result of Judeo-Christian/Western Civilization identity but as a result of common sense."
I'll side with Lewis, and the Supreme Creator of the Universe - who called homosexuality an Abomination for a reason.
There’s nothing subjective about the common sense of Natural Law. I’m guessing Lewis was alluding to something more in the realm of “popular opinion” or “consensus,” not the “sense” that divines universal and timeless truths.