It does not threaten society. In fact, there are some indications that Atheists have a lower level of marital divorce and bigotry than some Christians. Some pariah nations who grant few human rights to their citizens arrest and imprison individuals because of their beliefs and teachings. Again, this conflicts with many passages in the Bible which appear to state that all unsaved persons will be routed to punishment in Hell after death. According to many conservative Christians, the Bible clearly states that Hell is reserved for such unsaved people.
Many people feel that an infinite sentence for a finite crime is fundamentally unjust.
There do not appear to be any references in the Bible which suggest the eventual rehabilitation of the inmates in Hell, or of simply warehousing them for later release. The First Amendment of the U.S. Constitution, the Charter of Rights and Freedoms in Canada, the constitutions of other countries, and various United Nations documents, guarantee that everyone enjoys religious freedom. Some countries deny some of these rights to their citizens. In some areas of the world, it is an offense punishable by execution for a person to change their faith from the state religion to a different faith. But these countries are generally severely criticized by human rights advocates, and international courts.