Could you please do us a favor and ask him if he could wear something that identifies his position on this- so if any of us are in a situation where he could be in danger we know to NOT stop the bad person from raping/stabbing/killing/mugging/etc him- since he's apparently cool with that, but not with anyone defending someone else's life.
I think a giant dunce cap would be appropriate, but he can use whatever he likes that's uncommon enough that we won't mistake someone with a soul for him...