Thanks, mustardseed. I think you're right -- the issue was about our D, not our R, and I shouldn't have brought the R into it. I will work on not bringing my own emotions into conversations about our D in the future because it just muddles things.
(Having had a chance to mull things over, in a way it might actually be a good thing that he doesn't want to work on us for D's sake. Whatever hope he has for us comes from his view of our R, which is actually somewhat comforting.)
At any rate, he called me this pm and I let the call go to vm. He left a message with a question about arrangements for our D tonight; no mention of yesterday's blow-up.