Also, depending on the article you will look at, the socioeconomic equality reason will vary.
"The violence was undoubtedly racial. Its prime targets were the Chinese merchants who have flocked to Tibet by road and on a prestigious new train across the roof of the world. 

The mobs were the losers of Lhasa – the poor who seethe with resentment, outwitted commercially by Chinese traders, out-gunned by the Chinese army and, many fear, ultimately to be outnumbered by Chinese migrants."
Now this is straight from the horse's mouth. The actual Western journalist who was there wrote this- not some MSM that decided to twist the source's words. I thought it was the most NPOV and fair way to just say- they were angry about socioeconomic inequality, inflation, and fear of becoming a minority in their own city. Why is that wrong? It's the most concise, fair and NPOV way to state what they were angry about which caused the rioting.