@GracieGirl,
I think it's more complicated than that, though.
It's not wrong for a daughter to want a chance to love and get to know her biological mom.
But what does she do after that?
I agree that yelling in front of the woman's house -- cameras in tow -- was thoughtless and rude. There are many other ways that she could have approached her biological mother, such as writing a letter to her.
There are so many reasons that parents leave their children.
I just read a heartbreaking article a while ago about a woman who left her child because of encroaching mental illness.
Drug abuse is another reason why parents leave, and sometimes leaving is better than staying in that situation.
Sometimes people feel they are simply not up to the job of being a parent. It's a tough job, and sometimes making the decision to step away (especially if another parent is able to fill in) is the healthiest decision for everyone involved.
There are nearly as many reasons as there are parents who have left.
And sometimes these parents are just plain wrong. They leave for no good reason. This can be one of the hardest things for their biological children to deal with.
I understand your desire to know, one way or another, but I think what pretty much everyone is saying here in their own way is that you need to prepare yourself for the possibility that knowing might be more unpleasant than not knowing.