(Observation): The Warchief is the Horde, this has always been the case. The Blood Oath of the Horde makes it clear. “I am an instrument of my Warchief’s Desire.”
https://wow.gamepedia.com/Blood_Oath_of_the_Horde
(Commentary): To put it simply, if Turalyon had been around when Thrall formed the New Horde, I don’t think he’d have hated it. There’s just this weird assertion going around that he’s some warmongering light zealot when that hasn’t been shown to be the case. He’s remarkably open-minded and tolerant of others. He himself has said he has no interest in starting a war with the Horde, but he will protect the Alliance. Another poster summarized things pretty well.
https://us.forums.blizzard.com/en/wow/t/the-userper-spoilers/575200/6?u=crowngarde-wyrmrest-accord