A North Korean defector has written a new memoir about his days as Kim Jong-Il's teacher, and it reportedly portrays the North Korean president as not necessarily the great guy and super-nice dictator that everyone says he is. In fact, it kind of makes him look like a murderous Hitler-esque monster who just might blow up his old school and kill his teacher's entire freaking family. Some supporting data points after the jump:

• The teacher recalls the young Kim Jong-Il as a "nervous, diffident," and "ordinary" student with few friends, and also as a "young, innocent boy who turned into a monster."

• Kim later had his old school blown up "to eliminate potential rivals to his own children."

• Kim had his former teacher's wife, children, and grandchildren murdered in a gulag after he was caught talking to a South Korean agent about reuniting with his long-lost sister. He laments that, "To this day, I know nothing of the details of their deaths, of whether they blamed me as they perished."

• The memoir alleges that Kim "purified" the city of Pyongyang of all disabled residents overnight just prior to a 1989 festival.

• Kim also rid Pyongyang of short people by advertising a drug that would increase people's height, and then shipping respondents to die on uninhabited islands so that "their 'substandard' genes from repeating in a new generation."

• While the teacher, now in the U.S., admits he often "imagined killing him [Kim] and then killing myself," he has gotten over his anger: "I no longer loathe him. I pity him. Even though he killed my family, I have already forgiven him."

So, Kim Jong-Il = not as nice you think. Spread the word!