Cruel Characters

A new Feature-Length-film being cast in Atlanta, which I auditioned for, has me:
Preparing for a callback which entails creating a Foster-"Mother"(I use the term "mother" quite loosely, here)who is a mouthy, cruel, selfish bigot who earns her dollars by "fostering" poor African-American children.
What causes someone to behave in a cruel fashion? Sociopathy? Spite? Previous abuse?
In terms of outcome: it. just. doesn't. matter.
Hurt children, lost children, children who are left without self-esteem, who hear only barks from a headache-y, drunk mother, and who endure beatings, are damaged because someone damaged them, and the "reason" or explanation" behind it, matters not at all.
God--the Peace that lives within us-- cannot abide anger and hate.
Try to be angry or hateful in your thoughts, and try to commit a gentle gesture, like a hug.It's very hard to do.
And try the reverse: Think peaceful thoughts while trying to be violent.
Impossible!
So, let's stay in "Peace" mode, kids.
The world has enough cruelty, already.
Peace,kids.