My sense is that
It is all too easy to confuse calm with inaction or passivity. And remembering the awful 80's, when AIDS felled so many, actions like those of ACT-UP were born of anger and outrage.
Anger can get one going, but I don't see how it can keep one going over the long haul. Why? Burnout. The flame of anger burns up everything in it's path.
Getter to stay calm, focused, and ready to change with the wind. A little zen, no? Hard to pull of perhaps, but we have to stay in this thing for the duration.
Be the love you seek.