I dont believe in deism, but appears most people can not let go in a belief in a deity, so rather than taking the naval approach and sailing straight for Japan, maybe we can take a General MacArthur and go island hopping. Argue deism, it leaves open options of faith that their is a purpose for everything, while allowing us free reign to attack the idiocy of scripture without them falling back on the god of the gaps or the what caused the big bang arguments. It's an elegant belief system, a deity(god created the universe) but he does not violate the laws of nature, and does not send prophets or saviors. The theocractic defenses are nullified, advancing atheism seems to be a bitterly uphill route, undermining theocracy however, can be rather easy if we are clever enough about it.
Deism is pretty innocuous, especially compared to the concept of a personal god who is an interventionist :-) Deism does not require a religion. I don't think it is an elegant belief system, because the immediate question is who or what created the creator? It's the god of the gaps concept basically.
I don't want to burst your bubble, but I think deism would not adequately replace current theism because people are really into religion because they WANT a personal god. Most people only superficially care or say they care about who created the universe; most people care about believing there is an afterlife where they will live forever with their loved ones if the follow certain rules. Most people want their god to guide the surgeon's hand when their health is in danger; most people want their god to help the quarterback of their team make the most judicious, accurate pass, etc. Religion exists mostly because of people's fear of death and suffering, not as an explanation for how the universe came to be. People want a god who is their big sky-daddy.
I'm with Adriana here.
And I will add that many people cling to an interventionist god in the hope of eventual justice, even if only in another life, however hypothetical. The "life's a bitch and then you die" paradigm doesn't work for them, they can't digest the unfairness of it all and they long for justice.
A remote creator-only god does not solve this problem for them.
Deism would probably only work on the "institutionalized" religious that are disaffected and are in reality deists that don't know it yet.