He took the ogres' lives, yes. [Of course Hiro would pick up on that. The orcs had a hard way of life on Draenor.] They came to steal and kill as they had done so for years. Peace was not an option anymore, or at least not then.

He did what he had to do in order to help his clan, which meant risking his own life to free the captives. No one thought he was capable of such a thing. Some would see it as foolish to sneak off as he did and leave his hunting party without another warrior.

[Hiro is fishing for a moral, so Thrall sets him straight.]

Sometimes, risks need to be taken. And sometimes salvation comes from where you least expect it.