Because of its deep distrust toward Western and Western Media. I, as many oversea Chinese, was anger at flushing out foreign media at beginning. Later, when we saw Western Media manipulated in such unbelievable ways, the Beijing Govt. response became understandable:
http://www.youtube.com/watch?v=uSQnK5FcKas&feature=related (Riot in Tibet: True face of western media). Actually there was a journalist of the Economist Weekly was in Tibet from Mar12 to 19. The writer of Trashing the Beijing Road? I guess.
If you are in the Beijing govt. shoes, what would you do -
Even a man having such horrible background could be honored with Nobel Price of PEACE http://www.newspiritualbible.com/index2 (The Hitler Dalai Lama Nazi), http://www.youtube.com/watch?v=QJY1eK9jQ28 (Do you know what Tibet looked like before 1959?),
http://www.youtube.com/watch?v=tr46ApMFXzk&NR=1 (Free Tibet--Dalai Lama's Naked Truth Exposed)
http://www.youtube.com/watch?v=ZCLiNkz9xfQ (Free Tibet! Restore Dalai Lama's Heaven), http://www.trimondi.de/SDLE/Index.htm (THE SHADOW OF THE DALAI LAMA),
http://www.youtube.com/watch?v=2I2bvs3uZ4c (Tibet: Inferno under Dalai Lama & aristoric rule)
How would you think soon after the 3.14 riot in Tibet
http://www.youtube.com/watch?v=3yNS6DOoUSs (House Speaker Meets With Dalai Lama)
How have Western countries responsed to the killing? Any sympathy to the victims? How about their right to live?
There is a website (wenxuecity.com) of oversea Chinese, which totally independent of Beijing Govt. as I know of. Many people have exchanged their anger at Media's misleading and blocking of internet access.
Does it make any sense that Chinese Govt. block its own website, on only those links that related to Tibet??
Whoever behind the riot really did the most stupid thing to themselves. The riot pushed majority of oversea Chinese, including the dissents of, to be side with Beijing Govt. By my estimation, 95% of people who visit wenxuecity take the position with Beijing though they make a lot of criticize on the Govt. You know what - the majority wants the govt. to enforce the law on the lawless criminals and have fair policy to ALL the ethnic groups, including Han.
Again, I don't not speak for Beijing Govt. I just want to show you of Chinese side of thinking.