Bombs dropped by the US Empire and Occupied Korea killed 20% of DPRK's population and destroyed 85% of all buildings in the country, forcing DPRK's citizens to live in caves.

On 25 June 1951, General O'Donnell, commander of the Far Eastern Air Force Bomber Command, testified in answer to a question from Senator John C. Stennis ("North Korea has been virtually destroyed, hasn't it?"): "Oh, yes; ... I would say that the entire, almost the entire Korean Peninsula is just a terrible mess. Everything is destroyed. There is nothing standing worthy of the name ... Just before the Chinese came in we were grounded. There were no more targets in Korea."

No shit the DPRK hates the US, why the fuck wouldn't they?