Just start throwing the people that hire them in jail or super heavy fines, those laws are already on the books, they won't come back, they won't come at all. No welfare or nothing. You don't shoot women and children, but they won't be coming here to starve either. Since all these people coming here illegally are not poor women and children and are in fact very dangerous people dealing in gang wars, drugs and other stuff, don't spend too long asking them to please lay down their guns, better off just shooting them fast or there will be casualties on our side. As it is now, cops get scrutinized a whole lot more than citizens do in a shooting these days. Too bad, cause there are folks that need to be shot right away. There are some very bad people out there making some very big money on those borders. They need to be killed, no two ways about it, we all know it too. They are very bad.
Heck, if they just enforced half the laws on the fed books, you would not have to deport anyone, they would leave or be locked up constantly.
I for the life of me can't figure out what is so hard about any of this when it's so simple. Just follow the laws we put in place and stop trying to find ways around non-enforcement.