I think your response was appropriate, but can you imagine how blown away they must have been? JW's expect objections and are rehearsed at overcoming them, but nothing could have prepared them for this. It must have pulled the rug out from under thier whole day.
The tearful response shows me that once again, it's not the individual Witness I have a problem with. What's appalling to me, is the lack of information the typical JW (myself included) is aware of regarding the background of the organization they center their lives around and how little they know about those who are leading it.