Sorry but the man doesn’t miss.
The history is somewhat complex and there had been times during which Tibet was an empire up until the 9th century after which it splintered, was then part of different Mongol and Chinese dynasties and at times a vessel state and semi autonomous in certain ways. To say the PRC colonized Tibet in 1950 is certainly wrong though, and today Tibet is one of 5 autonomous regions in China which grants it certain autonomy over particular internal matters. Tibet is also 90% ethnic Tibetans and 80% Buddhist.