Lyric discussion by DyingThruSunday 

Cover art for The Enemy lyrics by Roadrunner United

I also agree with the meaning, but here it is a little more in depth.

This song is about a man who is a criminal (hense "enemy") but not only has he decided to stop feeling bad about his crimes, but continue to do them because he feels that it is his role:

I can’t forgive And I can’t forget Don’t you know who the fuck I am I’m the enemy

So knowing that he is the "enemy," he continues his crimes with the belief that being the "enemy" is his role and purpose in life.

Awesome song, GREAT vocals, and nice intro/outro