I've just stumbled across this thread and unfortunately am unlikely to find time to put enough into this reply, far less keep up with the thread, but as already stated it's completely up my alley. I'll just throw out a few thoughts in the hope that they contribute something to the mostly-worthy debate.
In the first instance it could be stated that we are all self-deluding, period. We take in the evidence of our senses and interpret it in a manner that makes sense to us. Our brains seek patterns, making continual comparisons with our previous memories. There's no guarantee that we are observing or interpreting things in the same manner as our contemporaries.
The beauty of the scientific method is that it seeks objectivity, at the very least by the consensus of repeatable experiments controlled by peer review. These are often conducted across the language divide. In this context it might be suggested that [Siva / Thor / Jehovah] are the same "object" that individuals interpret their subjective experiences as. Since "god" doesn't appear to turn tricks on command its awfully difficult to apply the usual scientific process, though. It would be akin to attempting to construct a rational model that would determine what a human would do in any given situation - its simply too complex.
I'm really sorry to see that the theory of evolution has been abused in this thread. It has little to do with belief in a deity. I'm quite content believing in both. I do have to state that it is definitely a "theory" rather than a fact, though. If we try to redefine words to suit our own ends then we are further deluding ourselves.
The bottom line is that generally speaking I agree with Hillary.