Have you done much research into teaching children how to handle anger? (And other emotions, too.) There's lots of good info out there. For example:

Dr. Laura Markham > Helping Your Child Learn to Manage Anger

Michele Borba on Helping Your Child Deal with Anger

Great ideas here:
50 Activities and Games Dealing With Anger - Kim's Counseling Corner : Kim's Counseling Corner

Someone needs to teach this little girl that it's ok to feel negative emotions, and that they are tolerable and that she can learn to manage them in healthy ways.