Discussion/warfare is not a good distinction in political conversations. If we come in with differing views, of course we’re going to be trying to convince the other that we are correct. That’s not two people trying to find the truth, but two people who are fighting against each others’ ideologies. This is normal, and has not changed.
I think the distinction they are trying to get at is more about honest and dishonest debate, using fair or unfair tactics. Hence the idea of defining words in a way to win an argument, rather than to simply find the definition. And, yes, this does happen.
On the left, you have the attempts to redefine racism to mean racism with power. There’s nothing inherently wrong with discussing racism with power, but you can’t make that into just the definition of racism. You have attempts to redefine whiteness to mean something like “racial defaultism” or “white normativity.” These are, again, legitimate concepts, but you can’t redefine things.
But the right does it, too. There are so many attempts to redefine racism to mean some sort of hatred, and to define away smaller aspects of racism. And then there’s the whole SJW, PC, virtue signaling, etc. The interesting thing is that the right will coin a term that seems to have a legitimate meaning.
Despite being a liberal myself, I much more often encounter the right wing version. I’m around left-wingers a lot more often, and even have political conversations with them, but I can count on one hand the number of times I’ve encountered this. But, whenever I see anyone making right wing claims, this stuff is all over it. All these redefined words.
And it is part and parcel of this “IDW.” Heck, I’ve heard this exact argument about discussion vs warfare used in this way, redefining what they are doing as discussion and what their opponents do as warfare. Because that’s what this movement is about. It’s not about intellectual honesty. That way was losing, so the alt-right started getting tricky.
I continue to encourage people to watch this “The Alt-Right Playbook” series on YouTube. These are the tactics we are up against by the IDW.
(And, note, he does say that none of this is exclusive to the alt-right, just that they use it a lot, and that other right wingers see it working and pick up on it.)