1- Blood on his hands.

They murdered my mom and they murdered my brother, leaving me without a family. What do you think I am going to do next?
Run? Stay put? Hide out so they can never find me?
No, that is just crazy talk. I'm going to hunt these people down and make them pay for what they did. Hopefully, I can do so without getting myself killed in the process.
They deserve to be brought to justice, no matter what the cost. The killers.