All of you are being too technical. Think political!

Two words: Chinese air space.

http://www.atimes.com/atimes/China/GI09Ad05.html
http://www.chinadaily.com.cn/english...ent_470025.htm

KL serves TPE-BKK-AMS.
And all BR flights going to Europe stop in BKK (except for the CDG-bound flights)
However, things are slowly changing.