In terms of lore, that is.
I get a sense that those guys really REALLY don't fit in that faction.
Let's take a look at the races that comprise the Horde.
Unwashed brutish Orcs who are warmongers and love spikey death decor of their towns/cities.
Savage forest Trolls who perform ritualistic ceremonies of voodoo.
Primitive Taurens who prefer living out in the wild plains and tree hugging.
Decaying and plague-loving Undeads who love torture and making things dead and then undead.
Gangster Goblins who will sell and then explode their own mothers for some quick cash.
and...
Clean shaven, limp-wristed, fancy boys who care more about the current hair fashion than picking up a sword. They have graceful, elvish style buildings that look very fragile and impractical for war/battle.
They stand out like a soar thumb amongst the dirty, rugged, warmongering atmosphere that the other races give off.