And you have no basis to take any high moral attitudes, when you believe that the bible is the immutable "Word of God", true in every detail, then decry those Muslims who believe in stoning adulterers to death, which is exactly what YOUR God is demanding of you if your belief is correct.
You cannot have it both ways. Either the bible is, as YOU claim "the immutable Word of God", in which case you'll be needing a good supply of rocks, or it isn't, in which case your slavish belief falls flat on its face

Let's get this clear here and now. I believe that what God says to be good is good. I do not believe that the Christian (Biblical) God is the same God as the Muslim god. Islamism is internally self contradicting, just as any other religion besides Christianity is, which I've explained a number of times before.
If God says something is good, it is good. If God says to stone adulterers, then so be it. . Of course there must be a trial, and two or three witnesses, etc. But the fact that God decreed death as the punishment for adultery tells us just how serious a sin it is. God is a judge--the Perfect Judge. For instance, if one was to come home one day and find their family slaughtered on the floor and the killer standing over them,(and if you have the self-control not to kill him in return), you'd take him to court as a murderer. The Judge looks at the man and says "You are guilty. You have broken the law, and you deserve punishment. But since I am a compassionate judge, I will not punish you for your crime. You're free to go." What would you do? You'd go to every newspaper, the President, anything, to tell the world that there is a judge that holds office that is more corrupt than the criminals whom he presides over. God is not a corrupt judge. He cannot, since He is good and perfect and holy, let sinful, wicked men into heaven. He cannot forgive them. He is completely and utterly just and right in condemning them to death, to the supreme Death of @#!*% , because to transgress against the holy God in the slightest is to commit such a grievous sin that it demands supreme justice.
There is forgiveness, but in only one way: Jesus Christ and His death on the Cross. If we aren't forgiven, every one of us is headed to our just punishment-- @#!*% .

I believe in capital punishment because God ordains it in his word. We all deserve it, and cannot escape it of ourselves.