The DPRK is pissed off because China, its only possible ally, is supporting every other nation. Unlike 1950, if the DPRK starts another shooting war (or rather, increases the level of violence) it will not have allies as it did in 1950. China disapproves and Russia dropped out long ago. The United Nations Command would re-activate, the US and others will put in troops and possibly use nukes if nukes are used against them.

The loser in this is the fourth largest economic power in Asia, the Republic of Korea, which will have to rebuild again.