The Alliance has a lot of shaddy moments durings Cataclysm like attacking the ship of Thrall, having the church of Stormwind being a recruitment ground for the Twilight Hammer, Taurajo, the constant expansion of Theramoore in that marshal zone, Rogers in general and sending farmers to their death in the plaguelands to name some are the best examples from their recent years.
However those actions are never addressed by anyone and just swep under the rug with the writers poking fun of it(See Maiev lines when pissed) or just straight up searching a way to justify their action, remember when Genn team up with Rogers only to be spiteful to the forsakens even at the maws of a legion invasion and Sylvanas getting some hero spotlight? Well turns out she is doing an evil thing and throwing away the alliance fleet and lives of the crew for a petty revenge turned out to be the best thing ever done by Greymane.