There are many ways to look at this, but im going to put a situation on it
If someone killed your MOM and DAD when you were a baby, then when you grown up and find out who did it, would you kill them for revenge?
ADDITION:
MY ANSWER!
no, because if I have never met my birth parents, how can you have feelings for them? im not saying I dont care, but I wouldnt kill someone for killing two people I didnt even know