Anyone who looks human may not be human. It's even worse when a pure living child is stolen and given to these deviants, bio-robots or I don't know what it is to be raised.
I simply do not believe that a real human mother could do this to her child - it would be against nature, against the most basic instinct of family preservation and self-preservation. No animal would do such a thing to its child.
The only solution is to cleanse the whole world of all those who do not have the divine spark in them (that is, they are not naturally conception and born) and are not a pure living being.