The Catholic and the crusading forces did what they did by fighting islamic caliphate for their own survival, these Ottoman murdering lunatics were burning Churches, killing Christian children, setting whole Christian communities on fire and enslaving Christian women for their sexual orgies. :

No state fought for Christian survival,becaus before the rise of catholicism ,Christians have survived many persecutions from the most terror government of the Romans empire,
They could have survived islamic caliphate without crusades.

Make no mistake Christianity grew and flourished not with terror and war or propaganda.

ajiboye007:
The Catholic and the crusading forces did what they did by fighting islamic caliphate for their own survival, these Ottoman murdering lunatics were burning Churches, killing Christian children, setting whole Christian communities on fire and enslaving Christian women for their sexual orgies. :

No state fought for Christian survival,becaus before the rise of catholicism ,Christians have survived many persecutions from the most terror government of the Romans empire,
They could have survived islamic caliphate without crusades.

Make no mistake Christianity grew and flourished not with terror and war or propaganda.

Exactly. This was what led to the first crusade. It was muslim atrocities against Christians in the Middle East that made Pope Urban II to call upon Christians to defend themselves and their spiritual heritage. This was what Urban wrote before the Crusades:
From the confines of Jerusalem and the city of Constantinople a horrible tale has gone forth and very frequently has been brought to our ears, namely, that a race from the kingdom of the Persians (muslims) an accursed race, a race utterly alienated from God, a generation forsooth which has not directed its heart and has not entrusted its spirit to God, has invaded the lands of those Christians and has depopulated them by the sword, pillage and fire; it has led away a part of the captives into its own country, and a part it has destroyed by cruel tortures; it has either entirely destroyed the churches of God or appropriated them for the rites of its own religion. They destroy the altars, after having defiled them with their uncleanness. They circumcise the Christians, and the blood of the circumcision they either spread upon the altars or pour into the vases of the baptismal font. When they wish to torture people by a base death, they perforate their navels, and dragging forth the extremity of the intestines, bind it to a stake; then with flogging they lead the victim around until the viscera having gushed forth the victim falls prostrate upon the ground. Others they bind to a post and pierce with arrows. Others they compel to extend their necks and then, attacking them with naked swords, attempt to cut through the neck with a single blow. What shall I say of the abominable rape of the women? To speak of it is worse than to be silent. The kingdom of the Greeks is now dismembered by them and deprived of territory so vast in extent that it can not be traversed in a march of two months. On whom therefore is the labor of avenging these wrongs and of recovering this territory incumbent, if not upon you? You, upon whom above other nations God has conferred remarkable glory in arms, great courage, bodily activity, and strength to humble the hairy scalp of those who resist you.

Thank God for the crusaders, if not for them, the marauding jihadist and agents of Satan would have taken over the civilised world then and we would all be living in misery today.