Firebrand

The crowd cheered as a firebrand was tossed onto the huge pile of wood to start the traditional homecoming bonfire.

[…] he filled all their throats with it, so that those poor wretches were by it made to cough like foxes, crying, Ha, Pantagruel, how how thou addest greater heat to the firebrand that is in us.

He that is inebriated with passion is unfit for any action; like Samson's foxes, he scattereth firebrands abroad, to the hurt of all that are near him.

The member of the college's Communist League was a firebrand who would launch a sit-in or protest march at a moment's notice.

At the same time, Mr. Irons said, it is important to separate “this very valiant and completely kosher and clean repository of public material, which we perfectly endorse, and this kind of firebrand ‘We want to show the publishers they’re wrong’ kind of attitude.”

Both Malcolm and King were firebrands. And both were disciplined organisers of people. Malcolm was able to channel the anger of a crowd into action, but then to ensure they did not descend into violence.