Ian, there is simply no way of proving spirituality or faith, it is in the mind of the "spiritual" or the "faithful." My stance on homosexuality is reinforced by studies,statistics and all of the official health agencies.
I dont think you are a bad or bigoted person for believing that male homosexuals can regulate their behaviour and fit into conventional society, but the evidence so far says that they are unwilling or unable to do so. Your stance may not be in the long term interests of homosexual health....but that is for you to come to terms with.