Bottom line - the law was broken when they entered the country. They, by definition, are immigrants to the country. Therefore they are illegal immigrants. Of course they're undocumented - they are here illegally.
Politicians use race as a stump speech to get into office. After the civil Rights Acts was passed into law many Republicans switched to the Democratic Party. See hate for what it is - evil. See politics for what it MOSTLY is - a push for personal power using any means available.
Bottom line - the law was broken when they entered the country. They, by definition, are immigrants to the country. Therefore they are illegal immigrants. Of course they're undocumented - they are here illegally.