What about the “Moderate” Muslims?

In episode 153 “Islam: Take 2,” Dan and I asked the question, “Are there moderate Muslims?” In order to make the point that the teachings of Islam itself are extreme—death penalty for adultery and homosexuality—we played the following video:

One of the things that stood out to me while watching the video is how hard it would be as a Muslim to disagree with the speaker’s position. On what legitimately Muslim grounds could you make your case that a woman who commits adultery shouldn’t be stoned?

The following video from the BBC did shed some light on this question:

What do you think? Is Islam unique in its threat to liberal western values?