@samuteki As a person who is (still) excited by Rage against the Machine, the line "(your) anger is a gift" (in their song "Freedom") has always given me the tingles.
Your thread is so much, including, I think, a brilliantly phrased elaboration of this point:
The anger of the oppressed is crucial for facing, and - hopefully - overcoming injustice (even if it might, in some cases, not be safe to express that anger publicly).