Quite a few "moderate" Muslims have some very disturbing beliefs about suicide bombings, according to a 2007 Pew Research poll -- www.pewresearch.org/files/old-assets/pdf/muslim-americans.pdf#page=60

26% of younger Muslims in America believe suicide bombings are justified.
35% of young Muslims in Britain believe suicide bombings are justified (24% overall).
42% of young Muslims in France believe suicide bombings are justified (35% overall).
22% of young Muslims in Germany believe suicide bombings are justified.(13% overall).
29% of young Muslims in Spain believe suicide bombings are justified.(25% overall).

With moderates like that among the youth, who needs extremists?