secular religion

noun1

1. •
   A communal belief system that omits or disregards supernatural or metaphysical elements (unlike religions) but shares most of the epistemic traits of religions, such as dogma, ideology, martyrdom for a cause, tribalism, demonization of outsiders, dichotomization of humans into the righteous versus the evildoers (good guys versus bad guys), and so on.

   • Fascism and communism are often described as secular religions.
   • Her theory posits that secular religions will rush in to fill the cultural void left by the decline of religiosity.