@oralloy,
Oralloy, you don't seem to realize that somethings are worse than other things. Let me put this in terms you might find easier to understand.
- If someone shoots their wife, that is wrong.
- If someone fires their gun in self defense, it is not wrong.
The argument you are making is that if shooting in self-defense is allowed, than shooting your wife should be allowed too.
In truth, these are two completely different circumstances. Only one is a crime.