Found this jewel in wowhead.
"We have an extra shipment of weapons on hand. I suggest we distribute them among the blood trolls. The enemy of our enemy, after all...
That should give the Horde a nasty surprise. And if the blood trolls accidentally hurt themselves... Well, it's a win-win."
https://www.wowhead.com/news=287647/...-over-spoilers
Glad Blizzard is actually trying to push the "morally grey" thing, the alliance can't talk about their high ground anymore after this. Also I love this because it's shows another flaw of Anduin he is naive enough to trust his advisors and militar forces at every word, heck wouldn't be surprised if Genn/Tyrande or the dark iron butchers a horde village and lied to him: lol don't worry we didn't kill civilians or childrens wink wink