Maybe you mean the Han Chinese. Certainly the native Tibetans and the peoples in the Muslim/Islamic regions may not share this sentiment (Tibetan Buddhists and Muslims are considered 'terrorist religions.' IIRC, it's illegal to be Muslim in China and all new Tibetan Buddhist monks are required to become Party members).
Dude, the Muslim part is plain false. I lived in Xi'an, a city with a large population of Hui Muslims.
http://en.wikipedia.org/wiki/Hui_people
I don't know where you heard about the Tibetan Buddhist required to join the communist party, but it just doesn't sound right. Joining the party is considered a privilege in China, you get all kinds of benefits, but mainly the ability to vote. I kinda doubt they would give this kind of political privilege to Tibetan monks.