>Yours is an argument is support of lawful killing.

Lawful killing is near necessary on some level. I am also against the death penalty, but I doubt you really believe what you are saying now. There are many lawful killings, I doubt you oppose all of them.

>You cannot possibly find a high ground here - except, perhaps, among killers.

There was a young girl in wisconsin who's parent were shot and killed. She was abducted by the killer and tortured and raped for multiple months. If she had been able to kill her captor would you say she took the low ground?

Since you think any killing should be considered unlawful, do you think she is a criminal?

>And I would counter that not killing other humans on purpose is a natural law that I respect to the point of disregard for any country's law that may require it

Sure it may be a natural sentiment. But it is not a law. Just because you think something is right does not make it a law. Many people think it is a natural law that killers be put to death, their feelings are not the same as law. Some people believe that rape is simply a natural part of humanity which women are overreacting to, and they would not vote to convict most rapists during trials. Some people believe that it is a natural law that whites are superior to others, and should not be punished as harshly.

Everyone thinks their own feelings are good, but luckily your feelings are not laws

I am not saying that you should not hold your views. But instead that it is reasonable that a state court rejects you as a juror given your disregard for the law which the court is established to uphold.