For a Christian, it is essential and right to mark the Koran as such a book. Mark peaceable Muslims themselves for mistreatment or injustice? Absolutely not. Mark their Holy Book as proceeding from an evil source? Absolutely. That is all part of being as wise as serpents but as harmless as doves.
Graham deserves applause from Christians even as he is excoriated for his words by the PC crowd.
The problem, in part, is that we hear the phrase "radical fundamentalism", and incorrectly assume this means that it's practitioners are taking the Koran literally. They're not. What they are doing is focusing on some hadith that generally have been discredited by most islamic scholars. As bizarre as it sounds, the true roots of what passes for "fundamentalism" are to be found in the 20th century.