I love how people claim they know everything about Warcraft lore and go around telling everyone how pandaren are a "breath of fresh air" in terms of ideological impacts, that they're the first to try and make peace and blah blah.
So did Thrall made a pact with Jaina because he was out of Orcish tail? Did Jaina murder her own father because of daddy issues?
The entire Orc campaign was just about mindless slaughter of Orcs vs Humans am I right? And on countless instances before pandaria, Thrall didn't try to maintain relative peace between the Alliance and the Horde?
Noooooo, of course he didn't, we needed pandaren (OBVIOUSLY!) to show us the meaning of peace.