Um... my opinion on 'the famous or infamous quote' by Cullen is that, I get that he's hurting, that he's been tortured and traumatized and has experienced something that I don't think we can truly understand as players. And I understand (now) why he responded the way he did in game, how that experience shaped his view of a people with whom he had earlier had great sympathy for.
But the issue that keeps cropping up with me is that Cullen isn't just someone with PTSD, he's someone with PTSD, with authority over the people who were ostensibly the source of his mental anguish, and that just doesn't sit right with me. Like I said before his character has gone through a lot and frankly by the endgame I have come to see him (Cullen) as the exemplar of what the Templar Order should be, maybe we don't agree on everything but someone who can be respected.
Putting it this way what if it wasn't Cullen that was tortured by the blood mages but another templar, and that templar ended up as Knight-Captain in Kirkwall, does anyone think that they would've had the same restraint that Cullen did and not take out their own pain on the mages?
I'm not trying to stir anything up or step on anyone's toes, that's just how I feel about it.