Still not getting it.
The US can create a law saying "you can only deport people to their home country". And if the home country doesn't allow that, don't fucking deport them.
It's basic empathy.
Otherwise, let's just all deport them all to Antarctica. It would save a lot of money on logistics, if we're willing to not give a fuck.
No, that phrase means "this situation is hopeless because the person is incapable of change". You can't turn a fly into a butterfly, no matter how hard you try.