morality is subjective and people don't have free will

[Edwardo Piet]

Anger is a quick natural impulse reaction... natural even when it's not rational.

That can't really be prevented even with the understanding that it's not rational knowing that there's no free will.

But it's much easier to prevent yourself from holding onto anger, and, at least in my experience, if you practice holding onto it less and reminding yourself why... it becomes less natural in time to react with anger in the first place... and you can kind of grow out of it.

At least in my experience.