Is North Korea Nuts?

This viewpoint should be common knowledge.
North Korea: A Nuclear Threat–An exclusive account of what Pyongyang really wants.
Newsweek International Edition
On Sept. 19, 2005, North Korea signed a widely heralded denuclearization agreement….to “abandon all nuclear weapons and existing nuclear programs.” In return, Washington agreed [to] “respect each other’s sovereignty, exist peacefully together and take steps to normalize their relations.”
Four days later, the U.S….imposed sweeping financial sanctions against North Korea…branding it a “criminal state”….
The Bush administration says that this sequence of events was a coincidence…. North Korean leaders view [it as an] effort by dominant elements in the administration to undercut the Sept. 19 accord….

When I warned against a nuclear test,…several top officials replied that “soft” tactics had not worked….
It was no secret to journalists…that the agreement was bitterly controversial within the administration and represented a victory…over proponents of “regime change”….
[Chief North Korean negotiator, Vice Foreign Minister] Kim Gye Gwan…said over and over to me, “How can you expect us to return to negotiations when it’s clear your administration is paralyzed by divisions …? So many of your leaders, even the president, have talked about regime change. We have concluded that your administration is dysfunctional.”