I think most of these Illegals will go home on their own once they find out they sold their soul to the Devil
The trains from Mexico are one way tickets only. These people are not going back to Central America unless we fly them there and we are never going to do that. The Mexican Government is not going to allow these people back into their country so they can return to Central America. Not unless they are traveling on US passports. Mexico enforces its borders.
Unfortunately they are here to stay and there are more on the way.
Better learn Spanish. Keeping your job or getting a new one may be contingent on it.