Genesis 9:6

Whoso sheddeth man's blood, by man shall his blood be shed: for in the image of God made he man.

1. The punishment for murder, according to God, should be death at the hands of other men.
2. Man was made to look like God, suggesting man is of great importance to God.
3. At least part of the reason for capital punishment is that man was made in the image of God and is of great importance to Him.
4. Those who advocate abolishing capital punishment for murder appear to be in opposition to the God who created them and the earth on which they live.