An explanation for the Tiananmen Square attack, via a link in The Guardian to Radio Free Asia:
....recollected Hesen (the jeep driver) making an emotional speech soon after some 100 police officers surrounded the mosque as workers demolished the courtyard.

Hesen made the speech as he told the mosque community to stand down after they argued with the armed police.

“At that time, Usmen Hesen jumped in and persuaded the community to disperse by saying, ‘Today they have won and we have lost because they are carrying guns and we have nothing—but don’t worry, one day we will do something ourselves’,” Turdi said.

“As Usmen Hesen finished his emotional speech, [his mother] Kuwanhan Reyim (also in the jeep) went to him crying, and hugged and kissed his forehead because of her pride in him. The crowd was also moved to tears and retreated.”
Link:http://www.rfa.org/english/news/uygh...013163042.html

The Guardian article has other views and links:http://www.theguardian.com/world/201...ent-repression