Spain was for a few years a legitimate target, but perhaps coincidentally since they have withdrawn troops from Iraq they haven't suffered again.
Maybe you should read up on Al Qaeda's long term aims of restoring the Caliphate. Iran and Afghanistan are certainly recruiting sergeants for Al Qaeda, but there were around long before it, and will br around long after we ever withdraw. They have aims of their own - and Spain will remain in the sights for other reasons....
Spanish police arrested 15 suspected Islamic terrorists in May, another 22 were arrested a few months ago. In all, Spain has arrested more than 100 since the Madrid train bombings in 2004. Most of the arrests have been related to the train bombings, but there have also been detentions for a plot to blow up the Madrid courthouse where those accused of the train bombs are being tried. Most of those arrested nationwide have been of Moroccan or Algerian origin, with residency permits, and having lived in Spain for months or years before their arrests.
26/06/2007 - Spain arrests two al Qaeda suspects
Spanish police have arrested two Moroccans suspected of having links to al Qaeda and recruiting people to send to training camps in Africa.
Police said in a statement they had detained Mohamed Laksir, 23, and Moulay Lahoucine Miftah Idrissi, 27, in Barcelona under international warrants lodged by Moroccan authorities, who want them extradited. The Spanish police said the two men were linked to al Qaeda Organisation in the Islamic Maghreb, previously known as the Salafist Group for Preaching and Combat (GSPC). Police said the pair were suspected of recruiting people and indoctrinating them with radical Islamic ideas in order to send them to training camps in the Sahel region.
Since the mainly Algerian GSPC rebranded itself in January as al Qaeda's North African arm, counter-terrorism officials have warned it might expand its ambitions to include parts of Europe as well.
France's top anti-terrorism investigator Jean-Louis Bruguiere told Reuters in an interview this month he was concerned the group might try to extend its network into France, Spain and Italy, which have large North African communities......
26th June - Spain arrests two Moroccan Al Qaeda suspects
Al Qaeda-linked fighters are being training in countries in the region such as Mali, Niger and Mauritania.
In a statement claiming responsibility for the Algeria bombings in April, Al Qaeda said it wants to reconquer Al Andalus, the Moorish name for Spain which was partly ruled by Muslims for centuries until 1492. It also said it aimed to end the ‘occupation’ of Ceuta and Melilla, two Spanish enclaves on Morocco’s northern coast.