[oytis]

These are Christian commandments, so it would help to understand what Christianity thinks of war to understand these. Even ignoring the tradition and focusing on the Bible:

- Do not murder is a commandment Israel received on Mt. Sinai. After that Israel continued its journey to conquer the Promised Land, which involved killing a lot of people (i.e. kill != murder)

- If you think New Testament has changed this, there is an episode in the Gospel of Luke (3:14) when soldiers come to St. John the Baptist to ask how they should change their lives. Guess what - he never tells them that being a soldier (and that was voluntary at the time) and killing your country's enemies is a sin. In fact early Christianity was popular among soldiers