Propitiation of a certain deity or dharmapala, enlightened or otherwise, is the affinity of the practitioner, or in this case the lama. We should not question his choice of protector.
Of course, to most people, they will be confused as to the validity of the protector as it is from China and the Dalai Lama is condemning the Chinese. Here again, thanks to the many links posted by Gypsy and explanations by Vajraprotector and WisdomBeing, hopefully the minds of the uninitiated will not be so disturbed by the seemingly contradictory actions of Chankya Khutuku