These are the key encrypted words:

"彻底地、真正地放弃分裂的主张，停止分裂活动，承认XZ和台湾都是中国领土不可分割的一部分，特别是停止目前在XZ等地煽动和策划暴力犯罪活动和破坏北京奥运会的活动"

Apparently harsh words hide something that CCP does not talk publicly

It has been a fact to the world that Da Lai has claimed that he has no intention for Tibet to be independent and Tibet is part of China. So there is no such a thing as 分裂 on Tibet issue

But why does China put those words in his mouth? Why doesn't China provide evidence, if any, that Da Lai was behind the current crisis in Tibet?

I can only speculate here that putting these words in his mouth will give CCP pretext not to talk to him.

According to biography of old friend of Mao, political tactics Mao often used to get rid of his political opponent is to put words in their mouth and then made it clear to public that his political opponents said this or that. That way Mao would immediately put them in a political defensive positions and amass political force to destroy them.

I believe that China and La Lai know that independence or separation is not issue here at all. The contention here is who/how to govern Tibet.