This morning I caught the end of a police reality show just before the morning news (which is also a police reality show). The reporter was talking to a policeman who was discussing his job as including shooting bad guys. She asked if he had any religious qualms about killing people. He fluffed a bit, but didn't really have any.
What he should have said was: correction, lady, the 10 commandments prohibit murder, not killing, but as I'm not an ancient Jew, they are inapplicable to me. On the other hand, Paul in Romans 13:4 tells us that the state has the sword for good against those who do wrong and that's what I'm doing.