From
Wikipedia.com:
In keeping with the Latin etymology of the word, religious believers have often seen other religions as superstition. Likewise, atheists, agnostics, deists, and skeptics regard religious belief as superstition. (Edmund Burke, the Irish orator, once said, "Superstition is the religion of feeble minds".) From the broadest perspective, all religion is a form of superstition.
Religious practices are most likely to be labelled "superstitious" by outsiders when they include belief in extraordinary events, an afterlife, supernatural interventions, apparitions or the efficacy of prayer, charms, incantations, the meaningfulness of omens, and prognostications.