If murder were legal, I suppose I'd really just jump on the bandwagon with the rest of us mortal sinners.
I would if needed to establish order and civility.
Murder is wrong by definition. Killing someone would require me to do something I would not like done to me. So the answer is no.
Murder is wrong.
Most people would not; the laws and exceptions of modern day society lead majority of the population to believe murder is a vile act. If this law is suddenly taken away, most people will still abide by it as their entire life they have been told that it is wrong, and henceforth will not do something they will believe is 'wrong.'
No. It is one of the Ten Commandments of God, "Thou shalt not kill." I listen to God first and the legal system second.
Law does not define correct behaviour.