"Whoever is without sin cast the first stone? I don't think so.
The fact remains that in the past, Christians and Muslims both have stoned women to death, with the full support of their respective clergy.
I haven't checked your links but stoning has not been generally considered a Christian punishment.
Look, nations professing Christianity have done some pretty brutal things but when doing so it is usually the Old Testament that is invoked albeit the respect for authorities commanded in the New Testatment can also be used.
Adultery is merely one of dozens of ways in which Christianity and Islam parallel each other. Why not speak as to some of the others?
Adultery, based on the posted article, clearly does not parallel. The differences are much more important. The founder of Islam is Mohammed who advocated a church-state and legalism. Chirst advocated a separation and faith.