The CTA wouldn't want to unite the Tibetans. If the Tibetans unite they may see through the game the CTA is playing and the CTA will end with no cows to milk. SO, they divide and conquer. Milking some is still milking. Having no Tibetans to milk means no milk. so some ins better than none. So, of course, they want the Tibetans divide.
The old adage, united we stand, divided we fall? Well, the Tibetans are falling due to the CTA, if only they will see it. But, nooooo, they are too busy fighting each other to see beyond the tips of their nose.