CEP Senior Advisor Ian Acheson writes: "But now, our high-security jails are filled with Islamist extremists who operate by markedly different standards. While the U.K. and Spain grappled with Irish and Basque separatists, these terrorists were not aiming for a worldwide caliphate that would subjugate all other faiths and make war on liberal democracy as such. Nor, despite their immense cruelty, did the Provisional Irish Republican Army (PIRA) or Basque Homeland and Liberty (ETA) operate under the pretext of divine permission to murder civilians."