I did feel awkward writing it - in this case it was actually meant sincerely. I really wasn't sure if I'd misunderstood. It seemed too ironic in a discussion on open minded-ness to basically say "I immediately stopped listening after I heard something I didn't like" (although maybe this is a reasonable approach? I'd strongly argue it's not, but that's certainly a discussion we can have). I'll do my best to catch myself in the future. I should say that I did read your comment as a touch condescending, just FYI.
WRT to Dunning-Kruger for open-mindedness (which is a very interesting idea) some quick searches didn't reveal anything obvious, but I may be using the wrong keywords - social psychology isn't exactly my strong suit! Sort of intuitively you'd think a similar kind of relationship might exist ("Of course I'm open minded, but I _know_ that X is X and Y is Y, but those are truths not debatable ideas!") - although maybe now I'm conflating open mindedness with the ability to think critically...