There is a difference, both moral and legal between justifiable homicide and murder. It isn't hard at all to see the difference between self defense or defense of others and murder, at least I didn't think it was. Some of you people are starting to worry me...
I don't dispute the difference - but I can only respond to what you say, not what you mean and don't type on the page... and I do know people who would make the statement you made and mean it literally. So until you made this statement I had no way of knowing what you meant; the joy of conversation - especially via text, where there is no inflection - is that one can only take the face value of words, not the implications meant by the author.