What country would want to waste their time and resources confronting N. Korea in an actual war?
As a member of the Communist left, Obama surely wants a "reunified" Korea...under rule of the Communist North, precisely as the Russians do. One of Obama's key missions in life is to appease the Russians and to help set the stage for a Soviet Union comeback. Be careful about believing anything Obama or the Russians say publicly on these issues. They'd obviously never come right out and admit openly what their true aims are. The Russians may well have given their OK on the attack beforehand.
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"The two sides [Democratic People's Republic of Korea and Russia] agreed to "promote and enhance friendly relations" in line with the joint declaration of July 19, 2000 and the Russia-DPRK friendship and good neighborly cooperation treaty of February 9, 2000.
Putin and Kim agreed during their talks to promote a Russian- DPRK political dialogue on the Korean issue and international affairs, and discussed many topical international problems, deputy head of the Russian presidential administration Sergei Prikhodko told reporters following the talks.
The two leaders spoke for an independent and peaceful solution to the issue of reunification of the Korean Peninsula, and against 'any outside obstacles to this process' as 'unacceptable.' ..."