If you rephrase that to 'having the right to kill me for protecting a conduit' then some would argue they did have that right.

[Tsukikage is calm. He pulls his hand back and he looks at Rin, feeling a little guilty for diverting his anger for some reason. His hand habitually picks the scabs on his arm through the bandages, trying to focus himself.]

An eye for an eye makes the world blind. I've made my peace with it, Rin. There's no need to chase either of them down. If there was a need to make them hurt, I would have. It's alright.