From reading some of your previous responses I now realize that you're unable to process all the information that is provided, while reading; because your FEELS get in the way and don't allow you to cognitively comprehend what's been offered.
To help you, I'll readdress a previous point and try to calm you on your confusion.
Children don't get the option to refuse; because parents make all decisions regarding of where they live, unless a Government agency steps in and makes the decision for them.
Therefore the parents have the choice of taking their children back to Mexico with them or finding family members living in the US, who are legally here.
If this is to difficult for you to understand, please ask you parents who decided where you were going to live when you were a child.
It's not a threat, it's a reality and they are the ones who have the choice to decide if their children are going to live with them in Mexico or with legal relatives in the US.
Are you still confused?
Do you remember Elián González; who was removed from the US and returned to Cuba, under Bill's Presidency?