You must be really thick-headed!
If they were here legally, as was the case in the particular case that you cite, where do you see a linkage to children of illegals?
The case could not have addressed it because the issue was not present. Understand?????
If you have a lawyer buddy call him up and ask him. If you don’t have a lawyer buddy call a lawyer who specializes in immigration law and ask him. He may give you the answer for free, he may charge you. Your problem.