The uncomfortable truth is that even believers are not entirely square with Christ in the way they live in this world.
Other than elucidating a very sharp line between believer and unbeliever, which is based upon an atomic action, not upon some average of conduct, we believers have no business being occupied with who is a worse enemy of Christ. Because we might find ourselves doing something dastardly and bastardly too.
Very true words.
...we believers have no business being occupied with who is a worse enemy of Christ.
We shouldn't look upon our brothers or sisters as "enemies". We are suppose to point out areas for improvement while understanding that we too fail. How people perceive us in telling the truth to them is between them and God.
Gal_4:16 Have I then become your enemy by telling you the truth?