The Christian Legal Centre has been speaking after an employment tribunal heard Ms Kuteh's claim of unfair dismissal.
She lost her job at Darent Valley Hospital in Dartford after a number of patients complained about her conduct.
One patient said that Ms Kuteh had told him if he prayed to God he'd have a better chance of survival.
Pavel Stroilov, representing the nurse, argued that she was simply caring for patients in their time of need.
He said: "A nurse without compassion would be unworthy of the name.
Speaking on Premier's News Hour, Libby Powell from the Christian Legal Centre said: "We really pray that the judge will clearly understand this action of the hospital...was wrong and that it would be right for Sarah to be reinstated.
"This is about making a move which bore no comparison on what happened."
Sarah Collins, general manager for medicine at Darent Valley Hospital said Ms Kuteh had "spirituality blurred the professional boundary" between herself and patients.
But Ms Powell rejected the claim.
"All she was doing was raising religion as part of her job," she said. "This was not Sarah going around preaching and offering prayer to every patient she saw.
"It came about because the NHS questionnaire [which she conducted with patients] had a question saying 'what is your religion?'."
Tribunal judge Martin Kurrein has reserved judgment.