Ah, well, yes, violence will get you what you want in the short term, but unless you exterminate your enemies, they'll still be a liability: violence doesn't convince anyone, it just makes them more tractable. Heck, even verbal combat, that is, argument, doesn't usually serve any purpose but convince both parties that they are right.
So, yes, "violence (and rudeness, for that matter) achieves nothing" is a gross simplification. "Violence brings very flawed achievements and has lots of terrible drawbacks" would be much more accurate.
Ah, well, yes, violence will get you what you want in the short term, but unless you exterminate your enemies, they'll still be a liability: violence doesn't convince anyone, it just makes them more tractable.
Let's frame it as comparing two options against each other (not one option against some unspecified ideal outcome). Based on a quantum event, in one branch of the multiverse you use violence, in another you refrain from violence. Is your long-term utility in the first branch necessarily lower than in the second branch?
Your enemies are not a homogen...
I have found this most wonderful (if fairly lengthy) article, and thought you would enjoy having it brought to your attention.
It is so good, I think we should include it among the references in the "Politics is the Mind Killer" wiki page. But, before that, I submit it to you, and ask you: is there anything in this article that would warrant its exclusion from this site? I mean, besides the fact that it is about politics, and written by a notorious Social-democrat (And is that in itself grounds for exclusion?).