Hi suzanne and welcome. P here is my biological daughter but I have come to the same conclusions re her as you have with your daughter......and I wonder how we can have one twisted kid and the rest of the family are normal.
I stuck by my daughter and supported her through thick and thin, tried to reason with her when she was doing something wrong.....but she was a good actress too and even fooled me that things were ok... I.blamed myself, blamed her friends.......blamed everybody but now I know she is what she is and there is nothing I can do about it.
I do believe these people have a choice.they know the difference between right and wrong cos we taught them..they choose to behave as they do..but then I suppose aswell that it would be as alien behaviour for me to be as my daughter is as it would be for her to behave as I do. we all are what we are..thankfully its the minority that are twisted.