The faction war should have ended with Varian yelling “FOR AZEROTH!”

I mean, seriously. How many freaking times can these two sides set aside their differences to kill a world destroying villain, and then go right back to petty squabbles.There would be no Azeroth 10 times over now if they never worked together, and these world ending threats seem to pop up every 2-3 years, so you would think the leadership would be smart enough to realize that these wars only weaken the planet as a whole.