Maybe he was freezing and the only piece of clothing he found on the ground was that elf skin whatever it was. Fact is you were just looking for any reason to kill him and you were a paladin. It’s not like he made the armor after he skinned some elf.
This is why you roll paladins. Just some power gaming way to kill someone based on whatever belief you deem necessary at that moment. How many people did the Catholic Church kill because they saw them as evil? How many people died in the name of Christianity throughout the centuries? They saw what they were doing as good and holy.
Anyway, I’m tired of responding.