Religious intolerance is intolerance against another's religious beliefs or practices. The mere statement on the part of a religion that its own beliefs and practices are correct and any contrary beliefs incorrect does not in itself constitute intolerance (ie., ideological intolerance). There are many cases throughout history of established religions tolerating other practices. Religious intolerance, rather, is when a group (e.g., a society, religious group, non-religious group) specifically refuses to tolerate practices, persons or beliefs on religious grounds (ie., intolerance in practice).