Well, he joined in 2012 (not that join date really means anything, I have been here 4 years and just joined last year...)
Anyway...
Maybe this was just one of those...
"Someone gave me a look on the bus today," post, which sent him into a rage, and the need to vocalize everything bad about Korea. Yet, he realizes the same flaws in others. He can't quite cope with this internally, and felt the need to post, with out any sort of rational or logical thinking.
It's sort of a weird way to come out to people, but hey...
It happens.