Mordred can't really offer any advice to Galahad in response to his beliefs. He doesn't know the man's God (is it the same one Mordred knows or another entirely?) and as a man of the Goddess himself, his knowledge is all secondhand anyway. He does hope for the best for the knight, though. Anyone with his fiancé's face will automatically have his best wishes, but Galahad seems a good person and that's more than reason enough for Mordred to wish him well.

"They... might?" The druid frowns softly at the idea. "Is it because their own gods treat them differently? I know I can't speak-- for God, even where I'm from, because I'm not one of His own, but I'd hope no one would be offended by hearing things that don't line up with what they know." Nothing productive comes from attacking someone else for speaking what they know to be true. It might not be true for someone else, especially in a place like the Nexus, but the idea that someone would get upset by hearing about God from Galeas or the Goddess from himself... It's disheartening, to put it mildly.