The Church of England has criticised the Home Office after it quoted the Bible to question an asylum seeker's claim that he converted to Christianity because it is a peaceful religion.
A letter from the department cited passages from Leviticus, Matthew and Exodus, and said the Book of Revelation is "filled with imagery of revenge, destruction, death and violence".
The refusal notice, sent to an Iranian national, added: "These examples are inconsistent with your claim that you converted to Christianity after discovering it is a 'peaceful' religion."
The Bishop of Durham, the Right Reverend Paul Butler, said the case shows the Home Office must radically change its understanding of all religious beliefs.
He said: "I am extremely concerned that a government department could determine the future of another human being based on such a profound misunderstanding of the texts and practices of faith communities.
"To use extracts from the Book of Revelation to argue that Christianity is a violent religion is like arguing that a government report on the impact of climate change is advocating drought and flooding."
A Home Office spokeswoman said the letter was "not in accordance with" its policy approach to claims "based on religious persecution".
She added that the department works closely with key partners to improve policy guidance and training provided to asylum decision-makers, "so that we approach claims involving religious conversion in the appropriate way".
Mr Butler, who leads for the bishops in the House of Lords on matters relating to immigration, asylum and refugees, welcomed the Home Office's acknowledgement that the letter was not in accordance with its policy.
But he added: "The fact that these comments were made at all suggests that the problem goes deeper than a lack of religious literacy among individual civil servants and indicates that the management structures and ethos of the Home Office, when dealing with cases with a religious dimension, need serious overhaul."
The letter was flagged up on Twitter by Nathan Stevens, an immigration caseworker representing the asylum seeker.
Mr Stevens, who said his client is appealing against the decision, wrote: "I've seen a lot over the years, but even I was genuinely shocked to read this unbelievably offensive diatribe being used to justify a refusal of asylum."