Having occupied Tibet, the Chinese Communist government carried out a series of repressive and violent campaigns that have included “democratic reform”, class struggle, communes, the Cultural Revolution, the imposition of martial law, and more recently the patriotic re-education and the strike hard campaigns. These thrust Tibetans into such depths of suffering and hardship that they literally experienced hell on earth. The immediate result of these campaigns was the deaths of hundreds of thousands of Tibetans. The lineage of the Buddha Dharma was severed. Thousands of religious and cultural centres such as monasteries, nunneries and temples were razed to the ground. Historical buildings and monuments were demolished. Natural resources have been indiscriminately exploited. Today, Tibet's fragile environment has been polluted, massive deforestation has been carried out and wildlife, such as wild yaks and Tibetan antelopes, are being driven to extinction.
These 50 years have brought untold suffering and destruction to the land and people of Tibet. Even today, Tibetans in Tibet live in constant fear and the Chinese authorities remain constantly suspicious of them. Today, the religion, culture, language and identity, which successive generations of Tibetans have considered more precious than their lives, are nearing extinction; in short, the Tibetan people are regarded like criminals deserving to be put to death.
--message by the Dalai Lama; follow link to read the full text