its kinda not there fault its all connected to there child hood,
Those who have suffered severe childhood abuse react to things much differently than those who didn't. Some go into a "survival" mode and do what they have done since childhood. Some run. Some fight. Some lash out when previously "it wasn't their nature."
I'm not saying that those have to be treated with kid gloves, either - as they shouldn't. They are adults and excuses shouldn't be made. However, some are so damaged that no matter if kid gloves are used or not it wouldn't have made a difference. In their minds, we are abusing them again...just in another form.
Even though I know I would have reacted differently had I known things, I will not ever make excuses for her behavior. And neither should they.
There are moments in this life when you are so confident in the rightness of your actions, that not even for a second do you consider the option that you might be wrong.