They were there as soon as the rebellion started technically.
Do you think we were building up outside of Orgrimmar during Escalation while nothing was happening inside?
Lorewise, you weren't allowed in Orgrimmar until after SoO was done.
We KILLED the orcs that stood with Nazgrim. They did not suddenly flop back over.
And another faulty claim on my argument you got there, I never said "every orc".
So...you put a claim in my mouth, and use that as a reason to dismiss what I said?
Not only that, but you're taking it horribly out of context.
Combine the Theramore citizens+the Horde leaders rebelling+Garrosh's propaganda+a decent amount of Orcs leaving Org to side with the rebels, there's no way the "average orc" didn't know what was going on.