Those might be older photos. When I went there two years ago, flags were everywhere, not to mention, soldiers with machine guns.
Also, I noticed that many of the Tibetans who worked in hotels or restaurants didnt like Han Chinese much, they seemed resentful. Of course, many of the Han Chinese tourists were oblivious to it, like they are oblivious to everything else, and every other culture.
It only makes me angry when it is clear that the government is forcefully using them as a means of asserting control. That, combined with the fact that Tibetans have no right to dissent or freedom of speech.