Hypocritcal response to North Korea

So North Korea have tested their nuclear weapon.

Already the condemnation is coming in -

UK

Tony Blair condemned North Korea's apparent first nuclear weapons test as a "completely irresponsible act".

USA

"A North Korean nuclear test would constitute a provocative act, in defiance of the will of the international community and of our call to refrain from actions that would aggravate tensions in northeast Asia... We expect the Security Council to take immediate actions to respond to this unprovoked act."

China

"[North Korea] has ignored the widespread opposition of the international community and conducted a nuclear test brazenly on 9 October... The Chinese government is firmly opposed to this... The Chinese side strongly demands the North Korean side abide by its pledges on denuclearisation and to stop any action that would worsen the situation".

Yet, North Korea is not a signatory to the Test Ban Treaty, they did ratify the 1968 The Treaty on the Non-Proliferation of Nuclear Weapons but withdrew from this in 2003. Its interesting to note that those currently shouting loudest...

...well, take a look at the figures -

1945 - 1998

USA (1039 Events)
Soviet Union (718 Events)
France (198 Events)
China (45 Events)
Great Britain (45 Events)
India(3 Events)
Pakistan (2 Events)
Unknown (1 Event)*

*Possibly Israel/South Africa.

So I ask, why the hypocritical reaction? Just because the rest of the world don't approve of the North Korean regime?