A very interesting discussion recently took place on ABC moderated by Christiane Amanpour. I think anyone interested in the subject of Islam and terrorism should watch (and this ought to be everyone). One of the main points made is that there is no "one true" Islam anymore than there is "one true" Christianity. People as diverse as the Rev. Wright of Chicago and Pastor Fred Phelps of the Westboro Baptist Church are Christians. It would not be right to consider either of these as the "true" Christianity and condemn all Christians based on the statements of either man. In the same way it would be wrong to condemn all Muslims on the basis of what the extremist Islamists teach. Similarly, it would be wrong to condemn all Mormons on the basis that some Mormon fundamentalists are polygamists.
However, there is another element to this discussion. Christian extremists and Mormon extremists do not have the political base that Muslim extremists have. Thank goodness that Fred Phelps is not the ruler of a country, especially a country with a strong military or nuclear capabilities. Islamic extremists do rule certain countries and do have enormous military might as well as millions of willing martyrs. This aspect of Islam, political Islam, does need to be feared in my opinion.