Also, other relevant quotes:

When a man is denied the right to live the life he believes in, he has no choice but to become an outlaw.
— Nelson Mandela, Long Walk to Freedom (1994).

If the oppressor uses violence, the oppressed have no alternative but to respond violently. In our case it was simply a legitimate form of self-defense.
— Nelson Mandela, Long Walk to Freedom (1994).

We must always take sides. Neutrality helps the oppressor, never the victim. Silence encourages the tormentor, never the tormented. Sometimes we must interfere.
— Elie Wiesel, Nobel Prize Acceptance Speech (1986)