I must be a simpleton. Three simple words: "we killed you". I don't understand any of them.
I splintered Honor ("you" = Honor; "we" = Odium + minions and/or traitors; "killed" = Splintering of Honor and maybe subsequent death of Tanavast): Obvious. But Odium doesn't seem like the most likely to be sharing credit with what he probably sees as lesser contributors. And Dalinar didn't say he was Honor. He said he was Unity.
We Shards splintered Honor ("you" = Honor; "we" = Odium
I've been thinking about this, and I think we might be proscribing too large a significance to who he is talking about. Here's the scene condensed.
As much as I also want to put huge cosmeric weight to those words, I think Odium is more concerned with the immediate present. He's also probably as familiar with shardic theory as anyone is, having splintered multiple shards after ascending himself, and he repeatedly states that as Bondsmith Dalinar has authority to speak/act for Honor, so it