Answer:
Christian
Step-by-step explanation:
In the 11th century, Christians in Europe were persecuted by Muslims in Jerusalem who had taken control of the Holy city after the more tolerant Egyptian rulers.
The first crusade came about when Eastern European Christians called out to Western European Christians for help in taking over the Holy land. With the influence of Pope Urban II, the first crusade was fought to take back Jerusalem. Christian crusaders laid seige to Jerusalem for 7 days and slaughtered Muslims and Jews.