A comment i made to someone who doesn’t believe Christians can join the armed forces:
The Jehovah’s Witnesses also say that anyone who joins the police, army or government, by swearing allegiance to such cannot therefore have allegiance to God.
Jesus demolished this false dichotomy by saying, “Render unto Caesar that which is Caesar’s, and unto God that which is God’s”.
A Christian can join the police or armed forces and render to Caesar what is Caesars, and at the same time, render to God what is God’s.
Jesus Himself said there need be no contradiction between the two, and by rendering to Caesar what is due him he can still render to God what is due Him.
And it’s the same for everyone, we cannot put any allegiance above our allegiance to Jesus, but it’s nonsense to say that allegiance to Jesus means you can have no allegiance to anything else.
The first argument that usually comes up is, “You can’t serve two masters!”
Yes, spiritually, you cannot serve two masters, but not in the secular world, when the Bible says explicitly to obey secular authorities and even for slaves to obey their masters.