Ok...this sounds alot better than the angry rant you started out with. In this case, if you got all the way to the blackbones and the cleric was not at least keeping people up in the middle of combat, then he was probably just being a tool. Personally, I would not have gone on to the blackbones when you are out of wands and/or pots, 2 people are afk, and the cleric that signed up as a healer is not healing. At that point, I'd either wait out the other 2, or perhaps reform with a pocket cleric. It still stands that based on your previous comments, you may have been a bit abrasive, which is probably why you got that response from the cleric. I am still kind of curious as to the cleric's side of the story, but c'est la vie....
On the positive side, hopefully you learned not to forget wands and pots, and that a LFM looking for healers is most likely not the best way to fill the group quickly and/or with a competent healer.