I'd like to know what these fascists call "secular religion"? Do they mean some nebulous thing like "woke"? Or various leftist ideology (chuds tend to mean this)?
It is implying that people don't actually become atheist, but rather that humans fundamentally need religion and that the need cannot be otherwise fulfilled.
It's a common argument from applied "scientists" in culturally religious nations.
In this perspective, "wokeness" is a pathology that arises from being lost and misdirected due to a lack of religiosity, as religiosity is considered by them as a primal human need.
Often, this is a self-directed criticism by the culturally religious: They see a gaping wound where religion in society and history has taken from them, but they see this wound as a void which must be filled with more of the same. And they are unhappy that they have been unable to fill it. They don't understand that it doesn't need filled, but healed. They assume that this void exists in all people and that atheists and agnostics are deficient human beings as a result.
It’s one of those things left intentionally vague so that the audiences can fill in the blank. It echoes MAGA not saying when America was last great or what made it great then. So one person fills in brand identity, another fills in wokeness, another fills in celebrity worship, another fills in big government, etc. The point isn’t coherency, it’s about getting people with wildly different views to think the solution is to turn the clock back.