Touchy subjects Ant, you don't like it, you could just leave, as implied by the main thread description.
On topic: I've had this argument with people plenty of times, and it's come to the same conclusion:
Science is evil, and so is religion.
How is science evil? People may apply it in terrible ways, but with science, we can improve our lives. We can save lives.
What do you mean "most religions"? This is a pretty vague statement and does not address at all religions like Hinduism which have been around for ages and are still polytheistic. Could you give a few examples at least?
Um, no. Hinduism is NOT polytheistic. Brahman is the god and the one god. He has many aspects. All gods are all Brahman--I believe I've addressed this before. Think of the Index Card thing presented by Blake--you can cut it in half, straight between through the index card, peeling it into two separate index cards--same amount of writing surface, simply half the thickness. There is now two index cards, but still only one card. This is much like Brahman (also called Ishvara)--all gods are aspects of Brahman, simply different facets of the same crystal. It doesn't quite fit the western definition of monotheism, but it's still one.
It is closer to Henotheism.
Depending on what branch of Hinduism you believe in--much like the discrepancy in the Christian religion about the trinity--it can be monistic, pantheistic or panentheistic. Henotheism, however, is the closest. (Sorry, some beliefs just don't fit into neat, pretty little boxes too well.) One of the largest denomination is Smartism, following the Advaita belief of absolute monism--the worship of all kinds of personal forms of god. There is unity with all person forms of god. I like the description as a single beam of white light breaking into colours, much like through a prism.