
Originally Posted by
Turalyon
Kerrigan is also introduced as being a kind, compassionate person (even though she's an assassin) and is more vocal in her resistance than Raynor in the use of the Psi emitter but she acquiesces to their use, too. We explain away the incredulity of that by saying she has unerring faith in Mengsk. Raynor is no different in this respect since he explains away his reservations by putting his faith in Kerrigan's decision to continue with Mengsk's plan (ie: the convo just before the New Gettysburg mission starts).
You also have to consider that Raynor already made a partial moral concession earlier at Antiga, where a Psi Emitter was used to effectively "condemn the entire planet" as well. Mengsk masks the dubiousness of its use at Antiga as a way to teach the Confeds a lesson, as an act of revenge for the loss of Mar-Sara (which was consumed by Zerg that was supposedly lured there by the Confeds) and a means to escape from the clutches of the Confeds. Yet Raynor doesn't bat any eyelid at all there nor scream "think of the children!!!" at the time, does he?