Why do some people hate Mexicans?

Every society worries about their own livelihood.

When new people, immigrants, come to an area they bring different custom's and culture. This culture has language and lifestyle's. Some of these lifestyle's add to the betterment of society and some don't. What causes issue for immigrants is either the greed of one group of leader's afraid to lose power to another, new, group, which happened when the Irish, Polish, Italian, Chinese and every other ethnic group came to America. Or the fear of the workers losing their job, or part of their wage to the 'new group' coming in.

Add to this illegal immigrants who come to a country without regard of the laws or rights of the people that live there legally. This put's another whole strain on society, mainly because the people coming in illegally hold no real value for the ways of the society they are coming into and the society they are entering believes that they are only here to take and not add to the society because of the illegal way they entered. Remember anyone that leaves one society for another is in essence an immigrant.