I do wonder if her bile is her meal ticket or if she truly believes what she spews.
She didn't know she was being filmed. She'd just been flown to Prague and received an award for uniting people (how she fell for that!). She was talking to a small group that (she thought) liked her and thought she is a good person.
She could have had no better motivation to be decent and generous in her acceptance speech. Instead she said monsterous things, worse than her usual public comments. I think even most overt racists would be uncomfortable listening to that speech.
I used to assume she was just attention seeking, but I think she believes every word.