Why do mexicans always think that they can beat up white guys?

I read the question in this section regarding those white guys that wore shirts, shorts, and shoes with the American flag on cinco de mayo. All the users were saying that they were lucky that the principal had sent them home because otherwise all the mexicans would of beat them up. Why do Mexicans think that they can beat up white guys. We need to remember that white people are physically taller and stronger than us mexicans. I myself am only 6'1'' and all the white people I know are like 6'4''. The majority of Mexicans are like 5'5'' and they are very scrawny. Furthermore, there are more examples of white people beating up mexicans than vise versa. The Spanish (white people) beat up the Aztecs very easily. The Americans (white people) beat up the mexicans very quickly during the Mexican-American war. Most recently those white guys in Shenandoah, Pennsylvania beat up a mexican immigrant to death. So why are there many mexicans in this section that claim that Mexicans can beat up white guys? All the time that Mexicans and white guys fight, the white guy always wins. You guys need to stop acting like tough guys or one day you guys will get your *** kicked by some 6'4'' feet white guys that play real football.