Yeah, and the ten commandments in the New Testament don't give exceptions for "death penalty" and "war"*, that doesn't stop Christians from signing up for the military or even seeing a contradiction.

* on the former, NT has an example of the crowd who want to stone someone, instead being convinced to leave; and the latter NT contains the origin of the phrase "to go the extra mile", which is about helping foreign soldiers occupying your territory and ordering you to help them (Matthew 5:41)