confusion

alright, say like 4 people run up in youur house and there gona kill your family. and u know this. lll use racsim as an example. lets say some people are gona kill this black guy and his family, just becasue hes black. the people come rushing in the house and u take it upon yourself to kill the intruders, or your would be killers. now you have 4 murders on your hands. is it still murder if its in self defense and in defense of your family? and now do u have more karma to work out or maybee that was one way of karma already working itself out? is murder, murder no matter how u look at it? idk i think you would have more karma maybe to work out if u didnt protect ur family then yourself then you would if u just let it happen with out a fight.