What eveyone else said. The thing is, Diablo 2 really isnt designed as a SUPER compedative PvP game the way it is played. No one balancing a predomiantly PvP game would have created a system in which certain characters could be completely negated. So, if you are gonna play Diablo 2 PvP, you have to deal with the fact that certain attacks just plain destroy your favorite character. Other skills or items take away your advantage. The real BM is being a jerk to people by using these aspects of the game, even if they ask you to stop.
As for the Death thing, melee duelers have a very limiting set of rules. Sometimes people who play a different facet of the game seem strange or absurd to the main stream, because we don't get why they have such rules. And as a result they dont fit in. There are people on Asia who would consider most US and Europe players idiots for generally not Juving, bugging or using hacked items. Different online culture = a lot of misunderstanding, and because this is the internet, that = a lot of insults, degradation and anger.