system
Given the following post, respond as if you're commenting on Reddit:
human
[Warcraft] Why didn't the Night Elves join the Horde at the end of the third war?

We see in World of Warcraft that the Night Elves are on the side of the Alliance, rather than the Horde.

Wouldn't it make more sense, that because of the Orcish shamanism, the Tauren drudic culture, and the Darkspear Trolls' connection to the Loa, that the Night Elves would have more in common with the other members of the Horde? These races not only have a connection to the more spiritual and primal side of Azeroth, but they are all considered savage by the races of the Alliance (Grom Hellscream himself comments on the Night Elves' savagery).

I get that the Orcs tend to be incredibly industrious, but so do the Gnomes and Dwarves (though with more elegance than the Orcs), that's not much of an issue with the Night Elves. There's also the fact that the Night Elves and Tauren have shared Kalimdor, and both are the only races (before Cataclysm) to possess any Druids.

Is it because the Orc's defiling Ashenvale was *that* unforgivable? Even if that's the case, the Orcs and Humans banded together after the events at Stonetalon Peak (and both fought the Night Elves as the Legion invaded Kalimdor), and then everyone teamed up at the battle of Mount Hyjal.
gpt
Ok so there's a lot of reasons why the Night Elves didn't join the Horde.

The big one is that the orcs defiled Ashevale and then killed Cenarius -AKA the best friend and mentor to the leadership of the druids , and a highly respected demigod.

Also the trolls and night elves are ancient enemies - so that's a black mark right there.

Also the Forsaken are as opposite to the Night Elves as you can get.

Basically while the Alliance has some of the same problems as the Horde, it has less of them and less baggage attached in recent history as well.