"It's the only way!"
Are you sure about that?

"It has to be done this way! It's JUSTICE!"
Do you really think so? Or is that your anger talking?

"It's the only language THOSE PEOPLE understand!"
Nonsense. It's the only language YOU want to speak. It's not the language that God taught you. It isn't what was decreed. It's not at all what you were told to do. It's just what you want. And, in the end, you'll convince yourself that all that blood on your hands was necessary and just and right, even though it isn't. 

And you'll find that nothing you do or think or say can get it off.