Britain's M.I.5 has disclosed data on suspected terrorist messages it intercepts, showing most (60 percent) come from Northern Irish radicals, not Islamists.
Interpol's Europe-wide data shows a similar pattern:
89 Percent of the 543 attempted attacks in 2007 attributed to Corsican and Basque groups in France and Spain
19 Percent of the 1,044 individuals arrested on terrorism charges in 2007 who were tied to Islamic groups
22 Percent of drop in arrests of Islamic extremists in 2007, led by sharper drops in France, Germany and Italy
43 Percent of European states where arrests of separatists and radicals in 2007 outnumbered those of Islamists