We are coming at this from the wrong angle to say some must not breed is near to Nazi as you can get.
However some children should at least for a time be removed from parents.
Some intervention , some re training and maybe higher expectations from those parents should not be seen as wrong.
The bottom line is a child's life his/her whole life can be ruined by the childhood years.
Hard stuff to think of but surely we must ask are civil liberty's more important than the child's?
If our child welfare in all its colors and names could drop the political correct rubbish, if it could re invent its self and see its clients more often we would not need this debate.