The above is, of course,
utter nonsense.
The purpose of true religion is to
glorify God and to encourage the righteous to eliminate
undesirable elements, such as for example the
Satanic packs of wild dogs even now devouring your
kin. As a
radical atheist, you probably don't even care. What are they to you, or you to them? A source of food at most, and that only in times of
famine or when they're in an abnormally weakened state.
Certainly,
false "cult" religions do "
evolve" (this is not a pure absurdity when said of those cultural institutions left by
the Almighty to fend for themselves; "
evolution" is an absurdity only when "applied" to the immutable species created by God), in a very cruel "
Darwinian" sense: Those which tend to create an unhealthy society will die with the malfunctioning polity they've destroyed.
Anti-Christian false religions do not have a "purpose", any more than the
Democratic Party has a purpose: They exist to perpetuate themselves, that's all. They are human institutions, and therefore both worthless and meaningless. If they perpetuate themselves successfully -- if they are benign or even
beneficial parasites, and their hosts survive -- then in retrospect they may
appear to have a "purpose", but that's an illusion. There is no intent there to serve the "purpose" of which you speak. It's an accident. There are those which just as accidentally turn out
malignant; the "
abortion religion" of the radical
liberal left is one such "religion". It will destroy its host, and in centuries to come it will be forgotten, along with dozens of other catastrophic failures such as
Heaven's Gate and the whole
Jim Jones thing. They will be forgotten, and the surviving
false religions will appear to support your claim. Your claim, in that far distant time, will again be advanced, and it will again be softlinked with that "Your radical ideas..." thing -- which, be it ever so valid, is getting a bit
long in the tooth.