As per SOP, you've taken something and intentionally confused it with another. No one has any problem whatsoever with the migrant worker program where non-citizens come here to work in relatively low paying, labor intensive jobs such as agriculture harvest. There have been many calls to expand and streamline that process. The issue are criminals who illegally enter our country, some caught and released after using appropriate buzz words and phrases, and many, many others never accounted for.
Whatever the sob story and the shitty conditions of their home life, it doesn't change the facts that there is a legal way to immigrate and there are illegal ways. We have immigration problems and there needs to be many changes in things, but don't piss on our legs and claim it's raining. No one is talking about removing "migrant workers". Oh, and you may also not know this little detail: the way a migrant worker program works is people come, they do a job, and they go home. They don't sneak in and stay.