Exactly-- either the prison officials had to eliminate all groups, or else they had to include non-religious people too.<quoted text> Exactly, but what it was really saying is that a non religious person has the rights a religious person does to form a group. The only way to justify a simple basic human right was to cover non belief under the same law as belief.
This is much the same way cocaine was included under the narcotics laws already in place, but we know cocaine isn't a narcotic, it was easy to define it a narcotic under existing law.
Another legal maneuvering or as you said legal fiction to cover something under existing laws.
The law must be blind with respect to religion/no-religion, or else it is unjust.