Re: how God feels about killing ?
Goofy, I believe there are two reasons to ask for forgiveness: Subjective and Objective.
In the case of objective need, you have flat out sinned, no doubt about it, and you need to ask forgiveness for that in order to have your sins removed.
In the case of subjective need, you THINK that you MIGHT have sinned, and you should ask for forgiveness for any sins you MIGHT have committed. If you did something that was a sin, it will be forgiven and removed. If no real sin was committed, - well, no harm, no foul.
It does have to be genuine, though - you must be repentant in your heart over anything you MIGHT have done.
I have asked for God to forgive any wrong intent I MIGHT have had on many occasions.
I think about the young man that I had a 12 gauge centered on his belly and was squeezing the trigger. He turned away and I did NOT kill him, but I had already made the decision to blow him away, and I was squeezing the trigger, so the INTENT was there. I certainly regret that incident, and have asked God to forgive any wrong I did by making that decision, even though if the circumstances were exactly repeated I would make the identical decision again.
I was GOING to kill him.
I did not WANT to kill him, and as I squeezed the trigger I was praying for God to intervene - which He did.
Whether or not there is a NEED for such asking for forgiveness is based solely on what is in your heart at the time, just as Jack said above.
Christ told me to arm myself. If you want me disarmed - - Molon Labe.