The curse of not living past 30, of course, refers to the Boje Family, and the only current descendant of the Boje Family is Levin.
Such methods are indeed cruel, for Neireida didn't hesitate to impose a painful curse on her descendants to ensure her own revival, passing it down from generation to generation without any regard for the feelings of Levin and others.
Anatole betrayed his followers, and Neireida's influence must have been behind it. If the upper beam is not straight, the lower beam will be crooked; if Neireida herself is not proper, openly violating taboos, then how could the members of the god system below her abide by the rules peacefully?
Perhaps...
By the time of the Heavenly Revelation God System, the Faith God had already started to stray from the right path.
However, Marvin was still very interested in The Gate of Demons. The Calamity Stele also mentioned The Gate of Demons and Ashis.