How come Mexicans get crap from doing things that are stereotypical of them?

For example if a Mexican has lots of kids they get crap for that, yet some white people have many kids and no one gives them crap for that. If some old Mexican men flirt with younger women, then all Mexican men are perverts, but yet look at hollywood and how many white Male celebrities date and marry younger women than them. A Mexican can't take a nap outside in public without getting stereotyped as lazy, if a white person is laying out in the park he is just enjoying nature.