Mexicans...why do you people keep bumping and brushing into me in public?

It is American etiquette and manners to not tresp on another person as this is rude and un-welcomed touching. White, black, asians, etc. have no problem with this. But whenever i'm in a place where there are hispanics, they always find a way to either bump into me or brush up against me. There have been many times when I got bumped or touched by several different hispanics in one setting or place. This repeated un-welcomed activity has made me want to just beat the h e l l out of one of them. I mean, it can be kids or grown men and women. I'm just curious. Is this a Mexican thing and why. No other race goes around bumping and brushing up on people. I say people because I am afro-american and other's have experienced the same thing. Why is this??? Is this battery on the slide, getting jollies off blacks or what? Or is it just a lack of manners and rudeness? Just asking and please no ignorant or racist answers please. I'm just trying to better understand so that I will know what i'm dealing with the next time it happens, so not as to lose my cool.