I'm gone for like one day, and there have been so much posts in the meantime, I'm not sure which one to trash first
...
About the GT using dark magic: I don't agree that having a horde of Vampires running around, killing, slaughtering and feeding on every single mortal is better that to use ONE spell that is "dark"... It is not the means which is important, but the goal.
The "crusade" started by Stirland is a result of Talabeclanders trying to invade Ostermark after Stirland tried to take control of Ostermark by using a little girl. HOWEVER, using an underhand trick to rule a province is better than invading it without any right to do so (see the Middenland inspirational speech for further arguments...).
Sigmarites aren't in league with the forces of Chaos. The Chaos Gods don't deceive a nation into fighting for an evil god. As long as that nation doesn't knowingly serve the Chaos Gods, the bloodshed caused by them will not feed the Gods. "Chaos Gods grow powerful and bloated by admiration and worship", as stated in the Hordes of Chaos army book, NOT by the bloodshed in itself. Causing bloodshed in the name of Chaos Gods is a way of worshipping them, but fighting a war in itself isn't, unless that war is fought in the name of the Chaos Gods, and the Sigmarites follow no Chaos God. They follow Sigmar, the bane of Chaos.
And even if Sigmar is not a God, then Sigmarites are the only ones who cannot be deceived, for they follow the memory of one man who halted Chaos every time it tried to wash over the earth. All Gods (including Ulric, Taal, Khaine, Sotek and many more) are created by the desires, dreams, fears and wishes of mortal men. These feelings are warped and given life by raw Chaos energy. Sigmar has not spawned from such feelings and thus, Chaos, but was deitified by men. Worshipping him or his memory is the only way of worshipping a God which was NOT created through Chaos.
Talabecland says killing such people is okay. Talabecland says halting the Vampires with any means necessary was wrong. I say Talabecland is the only deceived land.