I just edited a post in this thread to remove an ad hominem. Disagreement is fine as long as we play within the boundaries noted in the guidelines. Indeed, it appears something good can come of the conflict in this thread--as long as folks keep the discussion essentially civil.
You can voice a criticism of another member based on your opinion of what they've written as long as you avoid straight up attacks on their person. You can say you find somebody condescending or bitter or whatever--just avoid calling them a poopy face at the same time.