For radical Islamists, the key note is revenge: in one of Osama bin Laden's post-9/11 broadcasts, his deputy invoked "the tragedy of al-Andalus." So, let me get this straight.
My Spanish ancestors were deeply rooted in Western Civilization since the Romans won the Second Punic War in 202 B.C., the Islamic hoards destroyed most of Hispania's Hispano-Roman society in 711 A.D., it took my ancestors until 1492 to drive them back into Africa and they want revenge?
Well, bring it on. Under the banners of the Visigothic Kingdom of Spain, under the banners of Castile and Leon and under the Stars and Stripes, my family has been fighting these Islamic fanatics, on and off, since 711 A.D.
The fight ain't over.
The oft-proclaimed glories of Islamic civilization in Spain, and in the formerly Christian lands of the Eastern Empire were due the Arabs' contact with the civilizations they were destroying, not the other way round. Although a civilizational high point for the worthy oriental gentlemen, it certainly was not for the conquered and forcibly converted, taxed, enslaved, or executed.
In re the Inquisition: it worked both ways. Many a 'heretic' was burned in Calvin's Geneva and other Protestant strongholds. That was the game as it was played in that league at that time. No use comparing it to an interfaith picnic in Peoria.
Interesting theological character: Michael Servetus. Condemned by the Pope and the Inquisition in Rome, he fled to Geneva, where Calvin burned him at the stake.