What Gixer is saying is that he KNOWS the Iraqi people were happier and more content being killed by Saddam. The reason he KNOWS this is because he lives in New Zealand, where they get the "real" scoop about world events.
He also loves communism in China and Vietnam and KNOWS that people who live in those places are perfectly happy and content. Hey, he has been to China two times, he should know, right?
His girlfriend was born in China, that should be enough to assume Gixer is an expert on China.