Islam has done it before...

Ever wonder why the Crusades were justified?  Is it possible it was a long overdue response to centuries of Islamic conquest?
Here is a chronological listing of Islamic conquests prior to the first Crusade...
Year             Event
613  Persians capture Damascus and Antioch

614  Persians sack Jerusalem

633  Muslims conquer Syria and Iraq

635  Muslims begin the conquest of Persia and Syria

635  Arab Muslims capture the city of Damascus

636-637  Arab domination of Syria

637  Arabs occupy Ctesiphon

637  Jerusalem falls to Muslim forces

638  Caliph Umar I enters Jerusalem

639  Muslims conquer Egypt and Persia

641  Islam spreads into Egypt

641  Muslims conquer Alexandria

649  Muawiya I leads raid against Cyprus sacking the capital Salamis-Constantia

652  Sicily is attacked by Muslims

653  Muawiya I leads raid against Rhodes

654  Muawiya I conquers Cyprus

655  Battle of the Masts

661-680  Mu�awiya moves capital from Mecca to Damascus

662  Egypt falls to the Umayyad and Abbasid caliphates

667  Sicily is attacked by Muslims

668  First siege of Constantinople

669  Muslim conquest reaches Morocco

672  Muslims capture the island of Rhodes

674  Arab conquest reaches Indus River

698  Muslims capture Carthage

700  Muslims raid Island of Sicily

711  Muslims conquest of Sindh in Afghanistan

711  Battle of Guadalate

712  Conquest of Andulusia

715  Muslim conquest of Spain

716  Muslims captured Lisbon

717  Cordova becomes capital of Andalusia (Spain)

719  Muslims attack Septimania in Southern France

721  Muslims cross the Pyrenees

722  Battle of Covadonga First defeat of Muslims by Christians

724  Muslims raid southern France and capture Carcassone and Nimes

725  Muslim forces occupy Nimes, France

730  Muslim forces occupy Narbonne and Avignon

732  Battle of Tours (Christian Victory)

735  Muslim invaders capture Arles

750  Abbasids move capital to Baghdad  - Map of extent of conquest at this point

756  The Emirate of Cordova is established  -  Another map of conquered territory

759  Pippin III ends Muslim incursions in France

792   Hisham I calls for a Jihad Thousands heed his call to cross the Pyrenees to subjugate France.     Many cities are destroyed

813  Muslims attack the Civi Vecchia near Rome

816  The Moors support the Basques against the Franks

827  Sicily is invaded by Muslims

831  Muslims capture Palermo and make it their capital

838  Muslim raiders sack Marseille

841  Muslim forces capture Bari (in Italy)

846  Muslim raiders attack areas near Ostia and Rome.     Some enter Rome and damage the Churches of St. Peter and St.Paul.  The Leonine Wall is built to discourage further Attacks.

849  Battle of Ostia (Christian Victory)

850  Perfectus, a Christian priest in Muslim Cordova is executed one of the first of Many

851   Young Christians are executed for insulting the Prophet Muhammed

858  Muslim raiders attack Constantinople

859  Muslim invaders capture Castrogiovanni slaughtering several thousand

869  Arabs capture the island of Malta

870  Muslim invaders capture Syracuse

876  Muslims pillage Campagna in Italy

879  The Seljuk Empire unites Mesapotamia and a large portion of Persia

884  Muslims invading Italy burn the monastery of Monte Cassino to the ground

900  The Fatimid Dynasty assumes control of Egypt

902  The Muslim conquest of Sicily is completed when the Christian city of Toorminia is captured

909  Sicily comes under control of the Fatimids

909  The fatimid Dynasty assumes control of Egypt

909  Muslims control all the passes in the Alps between France and Italy cutting off passage between the two countries

920  Muslim forces cross the Pyrenees, enter Gascony and reach as far as the gates of Toulouse

972  The Fatimids of Egypt conquer North Africa

981  Ramiro III, king of Leon, is defeated at Rueda

985  Al-Mansur Ibn Abi Aamir sacks Barcelona

994  The monastery of Monte Cassino is destrpyed a second time by Arabs

997  Under the leadership of Almanzar, Muslim forces march out of the city of Cordova and head north to capture Christian lands.

997  Muslim forces burn Compostela to the ground

1004  Arab raiders sack the Italian city of Pisa

1009  The Holy Sepulcher in Jerusalem is destroyed by Muslim armies

1009  Caliph Al-Hakim bi-Amr Allah orders the the Holy Sepulcher and all Christian buildings in Jerusalem be destroyed

1012  Caliph Al-Hakim bi-Amr Allah orders the destruction of all Christian and Jewish houses of worship in his lands

1012  Berber forces capture Cordova and order that half the population be executed

1015  Arab Muslim forces conquer Sardinia

1064  The Seljuk Turks conquer Christian Armenia

1070  Seljuk Turks capture Jerusalem and begin persecuting Christian Pilgrims

1071-1085  Seljuk Turks conquer most of Syria and Palestine

1071  Battle of Manzikert

1073  Seljuk Turks conquer Ankara

1078  Seljuk Turks capture Nicaea

1084  Seljuk Turks conquer Antioch

1086  Battle of Zallaca

1088  Patzinak Turks begin forming settlements between the Danube and the Balkans

1090  Granada captured by Yusuf Ibn Tashfin

1091  Cordova is captured by the Almoravids
1095  Launch of the first Crusade. Wasn't this about time?  Talk about "turning the other cheek!  It took 400 years for Christians to respond to Islamic aggression and conquest!
This was a military expedition by European Christians to regain the Holy Lands taken by the Muslim conquest of the Levant, which resulted in the re-capture of Jerusalem in 1099.