Let's look at it this way.

Either the Horde knows of what Sylvanas did or they did not.

I would argue that if they did not, it could be considered criminal negligence given such a scope of mass murder.

If they do know, then we need to consider that they either approve, are indifferent or are powerless to stop it. Thus we have a setting where the Horde has a moral obligation to act against Sylvanas if they are to be considered "honorable" in any way.

So long as they do not remove Sylvanas from power, my RP toon would have to say that the Horde meaninglessly invokes the concept of "honor" while behaving in a dishonorable manner.

Taurajo, on the other hand, I think falls into a botched application of "Double Effect." The intended good was to eliminate a target which recruited and supplied soldiers. The bad effect was to kill civilians.

Now, we know from Alliance quest text that General Hawthorne willed the good effect, but **specifically** wanted to avoid the bad effect (hence the attempts to allow civilians to escape). We know that if it had been possible to destroy the target without killing any civilians, Hawthorne would have chosen that option.

(In terms of moral theology, the debate would be whether the end desired outweighed the unintended evil. If the intended good is less than the unintended evil, such an act would be unacceptable... this is why I say it was a botched application of Double Effect)

In contrast, an evil act would be to deliberately target the civilians to achieve the destruction of the village.

Since we know the harm done to the civilians was not intended, it is misrepresentation to say the Alliance intended the killing of innocents, and the Horde is appealing to dishonest propaganda in saying they did will this.

We can argue over whether Hawthorne gave incompetent orders or whether his orders were carried out badly by troops, but we can't equate the deliberate destruction of the Alliance towns and deliberate slaughter of Alliance civilians with the unintended killing of innocents in Taraujo.