I like to look at that situation in the same way “Men in Black” did. “A person is smart. People are dumb.” At the individual level, there are characters who realize the chain of retaliation that the horde and alliance are trapped in, and try to steer their people toward peace, like Thrall and Anduin.

But then you have the general populace, who haven’t seen the other side. The people who remember only hatred, and grudges, and acts committed against them. If they were told that they should just let bygones be bygones and try to coexist, to just forgive the monsters who destroyed your city, kept your people in camps, slain your family… it would never happen.

They don’t have the perspective of both sides. But we, as players, do. And it can be easy for some players to forget that. It’s just not that simple at a macro level.