[Valerian Mengsk]

^ This

Also, remember that our dear friend the general was on trial for war crimes just prior to this offensive.

To touch on the morality of the act of mistreating the dead:
A) Is it more moral for a commander to not do something morally wrong and have his men die as a result? (Fighting against an intact and entrenched enemy)
or
B) To make the decision and carry the burden of sin on his own chest in order to preserve as many of his men's lives as possible?
(as in this case where inciting either fear or rage causes the enemy to make tactically stupid decisions)

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