In exactly 89.463789% of the time, the best clue to the moral, social, and ethical views of Christians is not the Bible but their zip code.
In approximately the same number of cases the clue to the beliefs and practices of Roman Catholics is not what the church or the Pope teaches but their zip code.
As a general rule, the higher the authority attributed to Scripture, the more perverse the ethical views associated with it.
It is important to know what the Bible and the Koran teach. However, for all practical purposes you can ignore all that. What really matters -- and the only thing that finally matters -- is what Christians and Muslims believe and do. For this you need to know their cultural and family backgrounds, where they live, and their social location in their own society.