Shot em on site..yeah I said it..they try to cross the border..give them a choice, go back or a nice bullet, take your pick
How can you shoot women and children? Easy, just don't lead them as much.
Seriously though this needs to be a teaching moment. Detain them and them deport them back to where they started live on TV. Have military cargo planes waiting. Don't even feed them. March them straight to the plane and then a quick flight back to where they started. Then expose the group that funded this farce, that shouldn't be too hard to do, usual suspects, start with the blue lipped jug eared homosexual....