I find that the people on the forum who say they kill every origin are doing it because they don't like their evil, selfish, decietful tendencies. So if that's what Larian's trying to parody, then they're failing at that and completely missing the point, which does sound on brand for them. If they really wanted to parody those people then this companion would be an intolerant paladin with utterly no patience or sense of real compassion. Probably an oathbreaker who broke his oath for not showing any compassion.