From my point of view, the Alliance are the REAL GENOCIDERS. I-ignore Orcs killing the Draenei because that uhh that was BEFORE the current Horde and uhhh Teldrassil doesn't count!

*quietly shoves the orcs trying to genocide humans, dwaves and high elves in WC1 in a corner, along with the undead trying to genocide the gilneans in cataclysm*