Om Swami
How do I tell harmless firm anger from harmful anger?
Raised voice versus anger of ignorance
Sometimes anger is only an expression to get your point across, with a raised voice. The anger of ignorance is when you lose the power to think and say bitter, unpleasant, harmful words to the other person.
There is the anger of ignorance, in which you have not only raised your voice. You have lost your power to think.