I believe there is a difference between a "pacifist" and a "passivist". A pacifist would be an advocate of peace. He would necessarily abhore volence, and the commission of violence against another. A pacifist would, therefore, find a moral imperitive to intervene to prevent the commission of violence against another.
A passivist, on the other hend, could never be persuaded to, even in the pursuit of self preservation, any measure of violence.
Passivists are all either crazy, enslaved or dead.
a.cricket