Yeah but but it was an minority like arthas and most humans who were specified on books during those times enjoyed it, but most forsakens on books and whiches characters has being opened act more mercifully.
Forcing him to march on chains to their camp and shutting him down in a cage and not giving him a glorius death in battle turning the execution a shameful death.
Yeah they aimed but they didn't wipe them out until cata, which happened after varian declared the war. Yeah they were alliance associated with the stormwind
https://wow.gamepedia.com/Field_Marshal_Oslight#Quotes "The League of Arathor has sworn to retake Arathi for humans of Stromgarde and the Alliance. It is a battle hard fought, but a battle worth fighting." League of arathot were the faction the sended the alliance players to arathi basin and they owed no loyalty to rightful monarch Galen meaning supporting rebels for your own benefit and trying force them back into the alliance meaning warmongering in both parts horde and alliance.
That was just the first interment camp he went to were he went undercover while Orgrim was alive. He gave Durnholde keep and through blackmoore the rest and choice and blackmoore didn't take it. Also it was series of battle campaign and only first battle would be counted.
When did they make clear to Thrall? It was a forest... hard to tell if it belongs to anyone if they don't come to say it. When did any NE say to Thrall that get out of ashenvale after NE and orcs allied?