Does the sixth commandment simply prohibit murder, or is there more to the commandment than this? How does this commandment fit with the Old Testament and Israel’s bloody history? What does this commandment mean for us today?

Hatred and murder are forbidden in the sixth commandment because murder is a sin against God, but is there a place for righteous hatred and lawful killing? 

This article clarifies the meaning of the sixth commandment, and highlights the difference between killing and murder.