I'm certainly not one of them. I will never defend radical Islam.
You will defend "regular" islam? Try this thought on for size.
The islamist that subjugates the infidel, lies to them, desecrates their religious sites, and kills them in an exciting and seemingly ever expanding array of methods is following the tenets of islam. It is not only in the koran, but muslim islamic scholars through the ages have written extensively about it. If a non-violent muslim were to go fundamental, the behavior I just described is what you would get. On the other hand, a Christian that behaved that way in the name of his religion would not be following the tenets of Christianity. In fact the Bible is pretty clear that there is a place in Hell for people that do those types of things. So, people can accept islam as a legitimate religion, and not a violent death cult at your own peril; just don't ask me to go on that death ride with you.