The Miami terror plot is among several terror plots and attacks with links to the Caribbean – and Jamaica in particular. The British have “Londonistan.” Americans have a jihad hotspot of their own – the island-nations dotting their Caribbean backyard. Call it “Caribbeanistan.” In the aftermath of the Sept. 11 terror attacks, the Middle East was widely presumed to be the main incubator for Islamic-inspired jihad. However, the Caribbean has emerged often enough in terrorism-related cases to suggest the region may have some pathologies of its own. The most recent example was the foiled Miami terror plot. Its seven plotters...