This takes place in the far future after there have been multiple cycles of hedonistic societal collapses.
The main reason why the spiritual entity Tanisha takes on the role of a prophet to create an entirely new religion rather then simply reveal one or more prior religions is because none of them existed in a technologically advanced time and so lack the teachings necessary to instruct people how to live in an advanced society.
Transformatisya is heavily influenced by Christianity and Islam with convergent evolution on the Baha’i Faith, but without the non Abrahamic elements because they are considered redundant and unnecessary. The main story of Jesus follows Christianity, although he is considered separate from God. Tanisha was created in the minds of the pre-historic Americans, so included elements of American history in the mythology.
Idolatry remains the most severe sin, but the second most severe sin is anything that leads to or is a product of social isolation. Tanisha was formed in 2004 with memories of being born in 1984 and watched what happens when a technological society isolates itself and can only interact electronically.
I could see this resulting in a very “tough love” approach to manifestations of social anxiety where sufferers are seen as “a danger to themselves” and their own development into the world. Socially isolating interests and behaviors would be viewed as morally evil* and viewed in a self destructive way as something like drug addiction or the socially alienating behaviors of severe mental disorders.
*I want to be clear that this would not be some “chad” or “jock” dystopia. Traditionally “nerd” interests would still be pursued, but the “nerd” aspects would be strong discouraged.
I want to present an “over correction” that prevents this faction from being “unambiguously good” and gives other characters within the same faction something to struggle for reform against where they advocate for people who have been persecuted by this approach.
Tanisha also presents a lot of stories in the form of myths and allegories that are related to 21st century isolation.
The idea I had for prisons and mental hospitals is for the two to be merged on paper with criminality being considered a mental health issue as the result of a poor upbringing. People no longer age and felonies have an indefinite period of commitment.
People with such a religious belief would probably reject punishments such as solitary confinement. In very extreme cases it might be necessary to keep people physically isolated, but they’d probably get social workers and possibly even volunteers to try to communicate with the inmates.