Do Deists believe in Satan or demons?
No. First of all, the universe about us seems to be a supernaturally tranquil place, governed by predictable laws, which hardly indicates invisible supernatural beings like angels and demons fighting all around us. There certainly doesn’t seem to be any reason to think this is so. Secondly, evil doesn’t require an central organizer or promoter to exist. We are capable of behaving compassionately or sadistically without any supernatural beings whispering into our ears. As adults, we should have a sense of responsibility for our own actions. Third, thinking of the universe as being a battleground between absolute good and evil is perhaps one of the most dangerous paradigms promoted by monotheistic religions. The bipolar world it presents leaves no room for tolerance when its taken to its natural extreme. The trap is in thinking that those who are not with (fill in the name of our good god here) must be on the other side. When evil is defined according to allegiances rather than actions o