Although Tibetan culture is more recent, Tibetan medical practices can be traced back over 2,500 years.

none, there is no prove of physical genocide in tibet. But there were some culture genocide during the culture revolution in the 60s and 70s, (culture genocide is the attempt to abolish old tibetan practices) however Tibetans are free to practice there religion after death of Mao and the end of culture revolution. However the culture revolution wasnt aimed at tibetan culture.

Well, if you look at it this way, no.

The extreme nonviolence that Tibetans embody make their culture very unique.