Who started the war? [1]...

Who started the war? "In 711 A.D., Muslims crossed the Strait of Gibraltar (Gibraltar is actually a Western version of the Arabic name, Gebel al-Tariq) and conquered Spain. For the next 200 years, Islam would rule in Spain. In 846, Arab invaders also captured parts of Italy and threatened Rome, plundering the churches of St. Peter and St. Paul. The Muslims were never able to capture France, having lost a decisive 7-day battle at Tours in 732, but during the entire history of Islamic occupation of Spain, no bordering region was free from harrassment, pillage, rape and murder."