When is political violence justified?

[Anomalocaris]

I can agree that violence should never be a first impulse.  But it’s a tool that has to be kept in the toolbox. And it's probably more useful and necessary than many suppose.

What is meant by “first impulse” is ambigious.

When violence is committed, it is often because the impulse for it has bubbled to the top as other options have been closed off or have been rejected.   The closing off or rejection of other options need not be clearly associated with the crisis at hand,  so in the context of the crisis, the violence seems like the first impulse because it is the only viable impulse available.