Dave:
Thanks for a very poignant note. It would be especially sad to see you leave just as you have put your finger on what I have also perceived as a major problem for the libertarian movement: our tendency to pounce, criticize, moralize. "What do you mean you don't agree with us 100%? Check your premises! You have an undistributed middle term! Checkmate!" It's very curious that a Party based on the nonaggression principle should be so suffused with combative, militaristic metaphors, attitudes, and practices. That was apparent at least as far back as the early '60s, when Ayn Rand's Objectivist Newsletter featured an Intellectual Ammunition Department. Hit them over the head with killer arguments--we all know by now how well that works, don't we? The only person I know to have commented on that phenomenon, just briefly, was Robert Nozick in _Philosophical Explanations_. He was naturally an exception. We have a few such exceptions ourselves, including Starchild (like Nozick, a vegetarian); however persistent he can be on some issues, he is also gentle in his style, and not inclined to drive people off with assaultive questions and challenges (which may have something to do with his recruiting success). This kind of behavior has actually been more embarrassing to me in DAFs than sparse attendance. It's not a very hospitable environment even for our own members who would just like an opportunity to explore some issues in a tentative fashion. Dilger has bravely put out some nice posts in that regard, but in his position I would have felt more attacked than supported by the responses he got. I suspect your experience may have been similar. As Nozick said, we "leave no room for words on subjects other than last words"; whatever we venture to say, we'd better be prepared to defend to the death or shut up.
There's material here for an article at some point. I assume the issue has something to do with the fact that libertarianism disproportionately attracts INTJs (to use the jargon of the Kiersey-Bates system in _Please Understand Me_, which David Bergland has urged us to master). They're about 5% of the general population, but at least 90% of libertarians, in my estimation. (Starchild is a very rare ENFP, as you may be also.)
Anyway, I'm sorry if we've let you down. I hope withdrawing from the list doesn't mean withdrawing any farther from us than that.