Despite the many who have not read the book, the words “you shall not kill,” (lo taharog) do not appear anywhere in the Bible, and most especially not in the Commandments. In Exodus and Deuteronomy the Commandment is plain, “lo tirsach,” “You shall not murder.”
The Bible not only forbids murder, it also commands killing in self defense, as well as in defense of family and possessions, community, or of country. And yes, that funny looking gink behind the QT counter with a knife at his throat is a part of your community – so the Bible says you are commanded to do something about it if you can.
But the penalty for murder, backed by the testimony of two or more witnesses, is death.
Some claim Jesus changed these Old Testament laws. But Jesus said that anyone who changed even one word of the law would be damned to Hell. So these laws are still in effect for all of the People of the Book, whether they are Jew, Christian, or Moslem.
“Thou shalt not murder.” But “If one comes to slay you and take what you have, take up your weapons and kill him.”
Because it is commanded to all the peoples of the Book, be they Moslem, Christian, or Jew.