Violence ends when non-violent reforms are able to succeed. The real value of violence is that it makes the non-violent option palatable to the political center.

The doctor was against violence as a principle but he famously uses tons of violence (I guess in the form of trickery) but as a last resort.

House: “fear me, I’ve killed hundreds of time lords”

The Doctor: “fear me, I’ve killed all of them”

The problem here is that the war already started but just one side is really fighting it.

I would be in favour of not starting it too, but it’s too late now.

You can use words, but when does it end, and what makes you think you are going to end up better off?