I have not heard him spell out yet what he means by: “The good ones”
Nor has he spelled out what he means by: “let them come back”
The good ones: In my opinion, I would only consider ‘good’ those who have not committed any crimes or taken any welfare/stamps/tax credits. They would be criminals and perpetrators of fraud.
Come back: I would only allow them in for renewable one year worker permits; renewable ONLY from their own country.
Anchor babies: current law says they are US citizens, and no judge I can think of would permit their deportation UNTIL that anchor baby interpretation is removed.
I would simply enforce our more-than-reasonable laws—and thus none of them would be eligible to return.
But you, of course, are not in line for the presidency, whereas Trump is.