Being angry is useless in magic. It is a waste of energy.
You dont have to be angry to get strong magic. All you need is strong intent and focus (and know what your doing ofc).
Getting overwhelmed by anger is a sign a weak mind.
I agree, my point is that anger only exist related to egotic self (non magickal, mental stupid self) and when you “divorce” it from the “past history” of memories that are attached to the anger (which consist in a “reset” of the physiological responses to specific stimulus) it lose the emotional label so to speak and the energy is free to run through the body.
Emotions are actually not caused by exterior motives, they are caused by a reaction to specific thoughts that at the same time are a reaction to specific stimulus (inner or outer stimulus).
When someone identifies with the emotion, it does not flow properly and starts as a self-perpetuated habit.
To end with it you need to transform personal reaction into impersonal reaction, take off the persona out of the emotion, without the thoughts it cannot persist and is transmutated in what it was initially… a rush of energy.
At the same time you can only be affected (directly) by someone that has a similar emotional pattern, and works in magick, like baneful or even healing consist in creating a sudden resonance between your energy body (where the emotion you want to get into the other person) and the energy body of your target. Of course that is multiplied by houndreds or thousands depending on the level of your gnosis and the entities that you’re working, since some of then can regenerate the energy body or rip them appart.
So I see how those phenomenons can be assosiated by an unholy amount of energy (be it in any emotional form) and anger is a weird mix because it involves lots of energy but also lost of control… and that is just exactly what we see in movies.
If you could manipulate the same amount of energy, channeling into a very specific purpose, it may have the same effect but not so dramatic or violent, ergo not so hollywood.