Mexico is charging the US Border Patrol with human rights violations for firing tear gas tear gas at people hurling rocks and other objects at them from Mexico. The Border Patrol reported 987 attacks — many with rocks — on its agents during the 12-month period that ended Sept. 30, the most since it began keeping track in the late 1990s. "Independently of whether these incidents are a response to hostile acts against Border Patrol agents by private citizens on the Mexican side, the Mexican government considers these actions by U.S. federal authorities to be unacceptable," Mexico Foreign Relations said in a statement. http://news.yahoo.com/s/ap/20080201/ap_on_re_la_am_ca/mexico_us_border
Now if the Border Patrol agents were firing bullets instead of tear gas, Mexico would have something to complain about. Bingo
Mexico compains about the use of tear gas but has no problem that it's police use it on its on citizens. http://thereport.amnesty.org/eng/Regions/Americas/Mexico