The comedian Emo Philips has a well-known joke about religion that may explain some of the decline in membership... "Once I saw this guy on a bridge about to jump. I said, "Don't do it!" He said, "Nobody loves me." I said, "God loves you. Do you believe in God?" He said, "Yes." I said, "Are you a Christian or a Jew?" He said, "A Christian." I said, "Me, too! Protestant or Catholic?" He said, "Protestant." I said, "Me…
Rarely does anyone ever ask my religion but when people do i tell them Hellenism (Belief in the greek gods). People often give me a quizzical look - but when you study the 'religion' you find interesting beliefs that help you in modern day. For instance, claiming you don't have 100% complete faith in the myths and gods wasn't a heretic offense. Everyone respected the fact that the stories were arch-types that display…
Also note that they were pretty limited in their tolerance. If people got pissed at you, they wrote your name on a piece of pottery (ostrakon). If enough names were gathered, you were banished -- the root of the word "ostracized".
On the upside, they were very tolerant of transgender and intersex individuals. Note in particular the case of Callo/Callon, who changed their sex and pronouns.