The notion of the "axis of evil" has an interesting provenance. In early drafts of the President's speech the "axis of evil" was the "axis of hatred", "axis" having been settled on for its associations with the enemy in the second world war. The "axis of hatred" at this point consisted of only two countries, Iran and Iraq. whereas of course the original axis consisted of three (Germany, Italy, Japan). It was additionally noticed that Iran and Iraq, while not both Arab, were both Muslim. So they brought in North Korea.
We may notice, in this embarras of the inapposite, that the Axis was an alliance, whereas Iran and Iraq are blood-bespattered enemies, and the zombie nation of North Korea is, in truth, so mortally ashamed of itself that it can hardly bear to show its face.