Because they are losers? I am sure they would be the same if you came out on top kill them and 9 of their guildies.

They are truly *personally offended* that you killed them.

With most of these asshats that qq publically, somehow all the time they have in the game, all the /played, that they have nothing to show for it ... all the time spent LFG (when you could just walk into a dungeon without a queue, learn it, beat it) and wanting gold ... all the Ashes they don't have (because they didnt farm it, or had to share the rng), all the ninja looting they taken on, stuff costing too much in the AH, the loss rolls, the healer that wouldnt heal them in the bg, the lack of a tank in av, them loosing an av, etc ... they blame you. And their loser friends agree with them.

I agree, they are trolls ... move on.