If it is historical context and fact that is required:

1: The Soviet Union started arming the North Koreans in 1947. The attack on the South instigated by North Korea, was planned in conjunction with the PRC and the USSR. The timing of the attack was timed to occur after it was announced to the world that the USSR had acquired a nuclear weapon capability.

2: "Le May estimated 20% of the north korean population was killed." - Meaningless the total number of civilian casualties,i.e. killed AND wounded numbered ~2.5 million. Population of North Korea in 1951 was 10.5 million, the population of South Korea was 21 million.

3: "The bombing campaign was more intense than anything seen in WW2." - Absolute nonsense, until the Chinese intervened ALL air strikes were tactical against military targets. Anyone trying to state that what followed eclipsed in intensity, scale and severity the strategic bombing campaigns waged against Nazi Germany and Japan between 1939 and 1945 is just simply wrong.

4: Nuclear/atomic weapons would never have been sanctioned during the Korean War due to the fact that the USSR had acquired an operational weapon of its own in 1949.

5: North Korea has been threatening a nuclear strike now for years so to say that they would do everything to prevent war is ridiculous.

6: North Korea's nuclear capability was acquired through the "Atoms for peace" scheme, they were signatories of the Nuclear NPT. They rode a coach and horses through this treaty which they never, ever meant to honour. They have reneged on every single agreement they have entered into through negotiation. They have been instrumental in aiding the proliferation of nuclear weapons technology and in missile delivery system technology to some of the most odious regimes on the planet. It is high time that they are brought to book over it.