"Are you implying that I am an hypocrite for wanting revenge".
All Sango's explanation did was to inform her that the current him was against Getha taking revenge on the humans.
According to what he said, revenge is only for the losers who seek to satisfy their miserable ego.
In a way he is not entirely wrong about that. Getha's purpose for revenge is to get back at those who hurt her, to deliver to them the same amount of pain that she was given.
That classifies her as someone who is trying to redeem her ego that was bruised, her weak self that was looked down upon.
"You are getting me wrong".
Sango did say that he considers revenge as a means for the pathetic kind of people to regain their bruised ego, and he meant every word of it.
The problem with that train of thought is that he just talked about himself, how he who has no emotion feels about the concept of revenge.