@ Cannedbread

"If Varian Wrynn were right, he would make the decisions that were best for his people. He would negotiate with the Horde, trade Elwynn lumber for Durotar copper, and focus on the Scourge, the Burning Legion, the Old Gods and the Twilight's Hammer, the Naga, the Dark Iron Dwarves, and the Black Dragonflight."
And what are those decisions? You have Garrosh who is itching to conquer Alliance lands and at the Undercity, Varian discovers that Sylvannas has the Apothecary turned into a big poison factory specifically used to target Alliance citizens. What would be the best decision for Varian's people? Maybe you should be asking what Thrall can do to protect Varian's people since he's done a crappy job so far.

"Instead he's hard-headed, he argues with Garrosh and ignores Thrall (Garrosh is an idiot, but that's an entirely different argument) and Jaina. He holds Thrall accountable for the incident at the Wrathgate, despite the equal measure of casualties sustained on both sides, and the fact that there was a full-scale coup in the Undercity."
Who else is he going to hold accountable? At the Wrathgate, a bunch of Thrall's undead allies killed a bunch of his troops and his best friend. At the Undercity he discovers the Forsaken has a big section dedicated to being a poison labratory that's sole purpose is specifically to kill Alliance races and at the Throne Room, Varian sees Thrall handing over the keys to Lordaeron back to the Undead. Who cares if the Horde lost men too. If the Horde isn't doing anything to prevent more Alliance deaths, then Varian will take matters into his own hands.

"I could go on and on, suffice it to say that the current Horde is not Gul'Dan's Horde, it's come very close to being the same in name only. Many people who argue against "Horde Apologists" gloss over the fact that if you ignore demonic influence (just as they do) that the humans are responsible for the current situation with the Scourge, due to the actions of Kel'Thuzad, Arthas, and the Cult of the Damned the whole world of Azeroth is, yet again, in peril."
I could argue that the current Horde is the same as the old Horde, only they aren't slaves to Demonic influence. In WC1, the Horde came to Azeroth to conquer everything. What does Garrosh want to do? Conquer everything. Gul'dan tricked the Horde into believing that demons are their allies and will make them stronger. What does Sylvannas do? Have the Horde take orders from a Dreadlord, accept her people into the Horde, and sanction the creation of a death plague that she intends to use on humanity because like you, she thinks that all humans are like Arthas. Instead of Gul'dan, the Horde now has Sylvannas. Instead of Blackhand, the Horde now has Garrosh. Yeah the Alliance has its assholes, but the Horde's assholes are dangerous assholes that get people killed.