What can we say? The Horde are bad guys. We've known that since Orcs vs Humans. Not my fault it took Jaina so long to clue in.
I'm reminded of the classic Doctor Who episode, The Aztecs.
Quote:
BARBARA: I don't believe it.
IAN: Well, you must. If only you could stand away from this thing, you'd see it clearly. Autloc's the extraordinary man here. He's the reasonable one, the civilised one, the one that's prepared to listen to advice. But he's one man, Barbara. One man.
Barbara is Jaina. She dealt with one good orc (who didn't grow up among the orcs), one noble person, and that colored her view of a society that is largely corrupt, savage, and evil.
Jaina does deserve a good ending though.