Re: how God feels about killing ?
The Word of God never contradicts itself.
In Genesis 9:6 we are told: "Whoso sheddeth man's blood, by man shall his blood be shed: for in the image of God made He man."
In Ecclesiastes 3 we are told: "To every thing there is a season, and a time to every purpose under the heaven: ... a time to kill..."
Thus it does not follow that in Exodus, we are told not to kill. If this commandment was all-inclusive, it would directly contradict the many instances in the Word when we are clearly told that killing is justifiable in many instances.
SHOOT FIRST. SHOOT SECOND. MOST IMPORTANTLY, BE THE MAN WHO'S SHOOTING LAST.