I also feel the need to point out that the division of Korea wasn't just the US's doing, it was equally the fault of the USSR and the PRC who supported the government in the North and rejected that of the South... it wasn't a one sided game.
What faults are you referring to?
The nation of Korea was already divided before WWII. Splitting it in two insured that neither party would have control over the entire country. if it wasn't for the U.S., the entire nation would be under communist control right now.