I agree with your sentiments, Steve, and Terry's observations.
I think the real reason theists get the response they do here (at least from my personal perspective), is that:
1) they tell atheists what they think, feel and believe (like Perry did on this thread) which immediately says they've made assumptions, and most likely conclusions, about other people before the discussion even begins,
2) they judge atheists as being unintelligent, angry, immoral, having no sense of spirituality, basically, atheists are worthless human debris,
3) they then quite often say or imply that we will be/already are condmned by god for using our brain and following our conscience because we honestly arrived at a different conclusion than the theist did,
4) no matter how much information we give a theist explaining our position, or worse, completely debunking their claims, they act as if they never heard it and then continue on with their 'you must believe in god becaue I do' mantra. It really betrays a complete lack of interest in having an open, learning discussion where a sharing of views is acceptable without having to settle on a 'one side is right/the other is wrong' mentality.
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The worst part is when a theist initiates the discussion, then either exits the topic altogether or actually gets angry when he/she is met with anything but 100% agreement on whatever topic they are addressing, showing complete lack of interest in hearing any opinion that disagrees with their own.
Finally, I have a very low patience threshold when it comes to the Perry-types, simply bacause they do a lot of wolfing about being morally superior to everyone else (especially atheists) because they believe in god, and are equally as critical of their fellow Christians who also believe in god but see things differently (if only by minor deghrees), while they simultaneously endorse the most despicable actions performed by that same god as described in the Bible (killing of infants/children, genocide, blatant injustice, pettiness, cruelty, etc). And, the theist can come up with the most convoluted, illogical, nauseatingly repugnant explanations to justify those actions, actions which anyone with even miniscule amounts of humanity in them find offensive at best.