Why is it that after Mexico and USA play there is always so much hate?

im mexican and i want you to know that not all hispanics are like that.... only the imature ones which every race has, and its funny cause i go for U.S.A( just between those 2 rivals) and i too was dissapointed for their loss... but hey you gotta let some people celebrate and being assholes about it is just a way to rub it in ones face