Death Knights betrayed humanity, planned on plaguing the entire planet turning everything into undead, ravaged an entire continent, followed a former Alliance prince who betrayed his own race and killed their king, fought with monstrocities stitched with the remains of dead innocent lives, killed endless amounts of families, planned to commit genocide and plague entire areas killing everything in their wake and bringing it back as a mindless abomination... Yeah. They're hanging out in Orgrimmar and Stormwind at the moment drinking beer and laughing about it.
You'd say the same thing about them being ''flayed alive'' when all they got was rotten fruit thrown at them.
Next you'll probably suggest removing Worgen from the Alliance because ''they're still uncontrollable of their free will and will probably turn ferocious on everyone''
You can favor your ridiculous night elves but you won't disregard a playable sub-race which is ''your video game lore enemy'' because it's nonsense. What's next, attack someone irl for wearing a Horde T-shirt or listening to music you don't like? Stop opposing because you're not helping at anything posting negative feedback, you're doing the opposite.