For the uninitiated, read up the history of Tibet. They haven't always been peaceful monks. Most notably, the Tibetans sacked the capital of the Tang dynasty — one of China's most brilliant in terms of cultural accomplishments — in that dynasty's twilight years.
For the Chinese, unity is a matter of culture and national security. Surely you Americans would understand this. And for this reason, control of the Tibetan buffer region is paramount because it would otherwise be the ideal place to coerce or invade China.
And for that reason, and because Westerners so choose to ignore their own hypocracies, I too support the denunciation of the Dalai Lama.