Yes and no. Neo-paganism does incorporate old beliefs, but a lot were lost in time. I.e. certain customs, holidays, traditions, gods, meanings, etc. Christianity incorporates a lot of pagan concepts as well (though they'd never admit it). For example, the popular image of the Christian god is based on Jove (Zeus). So they do survive in some ways, but everything is lost with time.
As for robots, we'd have to program them to have faith first. That'd be pretty damn hard. Though getting them to manipulate human superstition might be doable. But in science fiction, that would probably result in them becoming religious themselves.