First off, it wasn't him who "necroed" the post. Pay attention to post dates before you go around pointing fingers.
Second, posting in a thread after it's been off the front page for just a day is hardly what can be called a necro.
Finally, I still wouldn't call the Horde the "bad guy" faction even in Cataclysm. I would call them one of two belligerents in a war where either side is doing retarded shit to the other side. Orcs attacking night elves in order to get lumber, or undead attacking Gilneas and plague bombing everything? These things can be considered to be bad, especially the undead plaguing everything, but on the flip side you have humans attacking and burning tauren villages and attempted murder on up-to-that-point-neutral goblins.
Horde vs. Alliance is not the "Good vs. Evil" war it was back in WC1&2. Instead, it's a competition for what remains of the world's resources, but it's also a peen contest between two ass clown brats. Honestly, the best solution, take Garrosh and Chynn and stick them in an arena. Hopefully they'll just kill each other so the smarter elements of Horde and Alliance can come to agreements and dealing with more pressing threats.
But Blizzard won't do that, because Horde vs. Alliance provides us with too much entertainment.