[He does understand as much, understands, at least, that this is how Keith feels-- and really it's just a relief that what Shiro said doesn't seem to have made any sort of connection in Keith. He knows how, a few years ago for Keith, the things he'd said would have absolutely devastated him. He's only glad that, despite everything he's done, that isn't something else he can add to that list.]
No. No, never. [He could never want that. Any of that.] But, Keith... I still felt it all. I remember feeling it.
It... [it's hard to explain.] Even if it isn't how I'd ever feel, I-- know the feeling. [He knows, distinctly, what it feels like to actively want to kill Keith, to do everything he can in order to make that happen. Even if the emotions weren't his own, he knows exactly what it feels like to be filled with that cold hatred.]