Being (as I would like to think) a reasonable theist who has occasionally risen to the bait here, I think there are two basic issues.
Firstly, the term "reasonable theist" appears to be an oxymoron to the majority of habitual contributors, so the "discussion" rarely rises above the Python's argument sketch (http://video.google.com/videoplay?docid=-572
077907195969915
for those who have forgotten).
Secondly, there seems to be a strong tendency to assume that all theists "must" believe certain things - if you're in one of the Judeo-Christian traditions, you must accept that the Dawsonesque stereotype of the murderous Hebraic deity is what you believe, that all religion is a matter of mind control of the pathetic masses for the benefit of the priestly class, that all who don't believe will suffer eternal punishment, that given half a chance we "religionists" would enthusiastically re-establish the Inquisition and so on and so on. Check the posts,over a period of time, see how rapidly they are channelled down the same old track. For a while, I quite enjoyed it, though frequently accused of "moving the goalposts" if I tried approaching an issue from another point of view. After a while, it ceased to become fun, and since I'm quite sure that the main protagonists can take care of their own souls and I feel no great urge to interfere, the pleasure of it evaporated.
No offence intended to any of the regulars. May your god go with you.