You forget the "But thou must" being chanted by the peace brigade.Let me rephrase. The excuses have always been lame, and Alliance has always turned a blind eye to their own dead, lost towns and cities, and what should be economic catastrophes. Since they aren't remotely interested in writing for Alliance, thereby showing a sane reaction to all this, why should we believe for a second that THIS TIME the Alliance will actually remember any of the Horde's chimping out?
I'll see your copypasta and raise you some off the top of my head OC:
Jaina: Hello friend.
Night Elf: Oh it's you.
Jaina: We must save Baine.
Night Elf: Why? He helped Sylvanas murder her way through our lands and burn most of our people to death!
Jaina: He's everything good with the Horde.
Saurfang: I agree.
Night Elf: It's you, the bastard who led the Horde through our lands! Prepare to die, you filthy...
Jaina: I know you hate the Horde, but we must be friends right now for Baine.
Night Elf: Why?
Jaina: Baine is Anduin’s friend.
Night Elf: The same little snot nose who refused to help us reclaim our lands so he could go piss on the Zandalari, Elune knows why?
Shaw: Yes, but they MIGHT have joined the Horde despite holding them in contempt as lesser beings.
Night Elf: But attacking them guaranteed they'd join!
Jaina: Look let's not discuss facts here, we're here to save Baine.
Night Elf: Fuck that, we're not helping these bastards, all it ever got us was losing lands and countless lives while people like Anduin said we need to heal the Horde.
Shaw: But look, Thrall and Saurfang are very sad about things!
Night Elf: No, enough is enough.
Jaina: Fine, you don't get to be in the cinematic or get credit for Hyjal.