I am someone who constantly teeters between Catholicism, Deism, and Atheism.
The thing is, Deism is not a religion. It’s a belief.
Beliefs of Deists have changed through the years, but the main belief is that some sort of god exists, but he is not a personal god. This seems to make logical sense to me. Looking at a finely tuned universe leads and the question of what caused the big bang leads to the thought that someone or something created the universe. But the thought that this same creator is actively communicating with everybody through vague and contradictory ways seems somewhat silly. So this leads to the belief that a god exists, but not a personal god.
Many great thinkers throughout time have been considered Deists, including Einstein. (Although there was debate over whether he was an Atheist.) Here are some quotes from him which many Deists would agree with:
The word god is for me nothing more than the expression and product of human weaknesses, the Bible a collection of honourable, but still primitive legends which are nevertheless pretty childish. No interpretation no matter how subtle can (for me) change this.
I cannot imagine a God who rewards and punishes the objects of his creation, whose purposes are modeled after our own – a God, in short, who is but a reflection of human frailty. Neither can I believe that the individual survives the death of his body, although feeble souls harbor such thoughts through fear or ridiculous egotisms.
It seems to me that the idea of a personal God is an anthropological concept which I cannot take seriously. I also cannot imagine some will or goal outside the human sphere… Science has been charged with undermining morality, but the charge is unjust. A man’s ethical behavior should be based effectually on sympathy, education, and social ties and needs; no religious basis is necessary. Man would indeed be in a poor way if he had to be restrained by fear of punishment and hope of reward after death.