Why Spain was attacked

The Conventional Wisdom says Spain was attacked by Al-Qaeda because of it's troops in Iraq and it's strong support of the US war on terror.

However, Scott Norvell says there was another reason for the attack, one that is over 500 years old.

Back in the 1400's, the Spanish crown won the final victory against the Muslims in Southern Spain and thus making Spain an officially Catholic country. Prior to that, Spain was part of the Islamic Empire and the terrorists think that once a land was Muslim, it must always be Muslim and wants their territory back.

It will be very interesting to see how the terrorists act now, will they continue to attack Spain because they think Spain belongs to Islam or will they move on to Italy, Poland, the UK for supporting the US war. Or will the terrorist attack France because of its ban on Muslim girls and women from wearing head scarves?