In their statement to The Independent, the community said that to harm Mr Henning would be “the worst condemnable sin” against Islam, and they plead with Isis to see the error of their ways and set him free.
In Islam, concern for fellow humans and the duty to help everyone is a religious obligation,” they write. “Anyone undertaking a humanitarian act is paving his or her way to receive help from heaven.
On Sunday Isis released footage which showed the murder of Mr Haines, and threatened to kill Mr Henning next.
David Cameron called the killing “pure evil” and “a despicable and appalling murder”, and has since paved the way for Britain to join the US in direct air strikes against Isis in Syria.