A quote from Tom Carew at his blog, 18 December 2006

On Monday evening, Dec 18, 2006, the Irish State-owned RTE 1 TV […] broadcast a 1-hour report on the Jihadi risk within Ireland. […] Firstly, there is a Jihadi propaganda operation active in Ireland. Secondly, there is, within the Muslim community in Ireland, high-level sympathy for Jihad. Thirdly, there is a small (15%-19%) element in this community, which supports such terror. Fourthly, several active Jihadi terrorists have been identified with Irish links. Fifthly, a significant Al-Qaida figure is based in Dublin for some 25 years, and has acquired Irish citizenship.

[…] Re 3, […] This level is broadly similar to several UK surveys, and suggest a pro-terror base of at least 8,000 in Ireland, quite enough to generate scores of active terrorists, and hundreds of active auxiliaries.