An athiest is one who strongly believes in the power of man,
in that power of man to build what he dreams,
to be what he wills himself to be,
and not believe in a god just to ask petty favors from, in return of devotion.
If the only aim of god is to help the man rise above himself,
to rise above the ridiculous flaws of a human himself,
then if every human were to follow that god religiously,
then the biggest devotee would be the biggest athiest.
To be the biggest devotee of this god, you've got to be an athiest first.