If they're illegal immigrants, who is the child going to be left with? By the definition of the law it's impossible to have illegal immigrant parents leaving children with legal immigrant grandparents, unless maybe there's some weird exception involving the stripping of ones citizenship. Is it common that you have mom/dad are illegal, aunt/uncle are legal, and the child would be able to be left with other family? That doesn't sound like a very common scenario. For one, I'd assume that if the aunt/uncle were granted American citizenship legitimately, either they had already been here a long time on visa and were granted amnesty, or they had gone through the official legal routes, which would make me wonder what happened with the parents in the first place to miss that. Additionally, while I know the US is weird in how it handles immigrants from Mexico vs most of the rest of the world, educated/wealthy ones usually get fast-tracked, which in this scenario means that the uncle/aunt are successful but the father/mother were not, in order for the "Better life in America" thing to apply, which should also be a minority situation (close families are usually of similar socioeconomic standing). So until I see some numbers explaining that the vast majority of cases involve little girls being removed from their parents and forced to live with creepy Uncle Pedro, I'm going to call it fear-mongering.