Robert Pape has an article on suicide bombing in the new APSR (What? Something interesting in the APSR? The hell you say!). Kevin Drum publishes an extract of an interview with Pape here, and Dan Drezner has a longer discussion here. The argument seems pretty interesting, as it puts to bed the notion that suicide bombing is at all connected with any particular religion, and instead suggests that suicide bombings tend to correlate with foreign military occupations that involve religious differences. Pape also suggests that suicide bombings are reasonably effective ways to get the attention of Western democracies.