This whole piece satisfies the criteria that you stipulate. It constitutes everything that you demand.
I still have a problem with your premise. I’m Irish, do I have an obligation to verbally denounce the IRA every time they’re in the news? Isn’t a demand that I do so not tantamount to tarring me with the same brush just because we share a singular aspect of identity? Aren’t you diluting the individual responsibility of people for their actions by assigning collective responsibility to people like that? I’m not a political leader, and I live my life in a way that demonstrates my rejection of violence as a means to my ends. Isn’t that enough?
Finally, no. Silence is not consent. Consent is consent. Does a rape victim consent by remaining silent? No. Premise disproven.
I’m not saying that attempts to direct the discourse towards a rejection of the premise of ‘justified’ violence isn’t worthy. What I am saying is that assigning guilt based on a person not having done so is a terrible injustice.