Syrian Ambassador disinvited to Royal Wedding due to killings but not North Korea...

Or Iran, Saudi Arabia, Qatar, home of Al Jazeera etc.
This quote from Harry's Place:

Execution Tunnels in North Korea

Alec Macph, April 28th 2011, 6:09 pm

Every so often a snippet of news comes along which makes something inside of you groan. The Daily NK reports on claims that tunnels in North Korea have been adapted for mass-executions of political prisoners if the regime ever be threatened.
Elsewhere, as a result of studies of interviews with North Korean defectors, the number of camps and other facilities has been concluded to number almost 500. Stories from one, the woman-only Jeungsan Reeducation Center in South Pyongan Province put me in mind of female survivors of the Soviet gulag who suffer prolapsed uteruses following beatings.