Chris, I think we can accept that Jesus was a pure pacifist, but I do not think that descriptive fact leads directly to any normative conclusion. Surely, it cannot be the case that in failing to act like Jesus in every way is to act unjustly.

That said, Jesus does speak on violence. He tells us to love our enemies. He tells us to turn the other cheek when we are struck on one cheek. He tells us to give our cloak to the thief who robs us. These, certainly, contain normative import. But, do they contain the normative implications which you suggest?

It seems quite clear that Jesus's ministry opposes retribution (at least on earth). But, not all violence is retributive. Some violence is necessary to prevent serious violation to oneself or others. If we take Jesus to be saying that we are never justified in resorting to force, then we have to say of the woman who fends off her would-be rapist by punching him that she is sinning and acting unjustly. If she kills him...

I'm not on board.