The First Amendment gives citizens quite a freedoms. One of these is freedom of religion, and we take this for granted, but it was not always free for all.
Inmates were not always able to pratice their religion in correctional instituations.
The 2006 Cutter v. Wilkinson decision changed the idea of religious practices in prisons.
Some institutions didn’t properly monitor religions, which lead to false promises fom "religious leaders". It boiled to a point, and it resulted in riots amoung the inmates and staff.
While some instiutions had problems, others found a balance with inmates and followers of many religions in prison.
Since the decision there has been many ups and downs with religion in prison, but we are seeing more good than bad. The hope is that institutions can create grey zones that are for only religous uses, which promots peace among religions.