So why ask Mexico to “accept” repatriations? Round up the illegals, reform them into foot caravans like when they arrive, and force them to walk back the way they came. If they refuse to move their feet in the right direction, load them onto trucks, drive them into Mexico, and dump them. Keep this up until Mexico builds a wall.
Take them to international waters off their homelands and pay fishermen to take them to shore.
If the invaders don’t agree, put lifejackets on them, $50 each in their pockets and toss them overboard.