Meaning that beliefs like those of the flerfs resemble religious beliefs more than anything. I make no secret of my disdain of religion in general. I see things like flerf "reasoning" as being a substitute for religion, or gang membership, or whatever. A cult is a cult is a cult. As PeteByrdie so succinctly put it, it's about defective thinking. Cult members of all sorts these days like to claim their opinions are as valid as anyone's. They might hold the opinion that Earth is 3000 years old, or that pi=3, but they are wrong. Their precious opinions are demonstrably false.
I figured out about thirty years ago that Science and Religion are each right about the other. Both can be full of shit. Religion, however, has outlived its usefulness, to the point that any real spirituality is carefully cleansed from the dogma. Churches still fill a social need in many ways, for many people, but those needs can be met without the bullshit and without the oppression of others who don't believe the same things.