@catharsis80

"I think you may be forgetting that Thrall's story was almost exactly the same -- he was forced to complete in gladiator games for humans. Strange thing is, he's been able to befriend humans, and doesn't hold it against them (i.e., Jaina). Can Wrynn say the same? No. He hasn't forgiven."

Thrall was a slightly different case. The Orcs were the invading force at the time, and unknown force too, new to Azeroth. Humans had no idea what they were dealing with. True, this does not bear excuses. However, now when both sides are equally aware and educated on what is really going on the Horde decided to enslave a prominent leader of the opposing faction (while not at war with, right?) and use him for blood sport.

That sounds to me like a good reason to go to war. Now I sincerely believe Thrall is appalled by the actions of the Horde, but it's not like Thrall was in the dark of all this taking place.

The Alliance has been without true leadership for a long while. Just so happens that Wrynn is the first person to step up to the plate and really take a stand. Maybe it's time to take that stand. Thrall has become a bit of a pussy, and that's hard to deny.

With the way to Draenor now open, the Orcs can return home at any time. Yet they remain. The undead, the Forsaken, with undeath in general being an abomination, should take their leave. However, to keep things balanced 5 by 5, the lore won't head in that direction.