Tibet has always been part of China. There was no such "Tibet independence" before the 20th century. Most countries in the world recognize Tibet is an inalienable part of China.
The Dalai Lama talks about human rights, freedom, and democracy. But through his support on violence and vandalism incidents, and condoning self-immolation of many young Tibetans, we can see his lack of respect of life and disregard of human rights.
We believe it is an insult to many people by inviting such a hatred and separatism-advocating person to visit the US and give a speech. We hope you will not be confused by words of the Dalai Lama, not let him become a discordant notes in the US-China relations, and what is more, not let him hurt bilateral relations and normal development between the US and China.