The Holly type experiences feelings of anger, jealousy, envy, hatred against another. It is said to be one of the commonly needed remedies. It certainly would be useful in some spiritual circles I've seen!
Holly is a very useful remedy when you're feeling intense feelings of hatred or the need to hurt or do something to someone, especially on a psychic level. It's the remedy to take when you feel an overwhelming urge to do something destructive to make a point.
Actions based on such feelings rarely get the results you want as the other person does not see things from your point of view.
For Empaths:
When the Emaph is suffering from depression, it's not unusual for anger to happen from time to time.
This is due to frustration.
Holly wil aid the empath in those times.