When a pope calls a crusade, is he infallible in that regard? Does the Holy Spirit inform the decision, or is it solely the prerogative of the Pontiff in his capacity as a human person?
It would seem that acknowledging the righteousness of the Eastern Crusades is not a de fide matter; could a Catholic conscientiously dissent from the popular notion that the Crusades were justified?
Citations welcome. Thank you.
The Crusades were justified, fully. However, it was something that Urban II had to
sell to Catholic Europe:
http://www.fordham.edu/halsall/source/urban2-5vers.htmlThe introduction sums up things nicely,
"In 1094 or 1095, Alexios I Komnenos, the Byzantine emperor, sent to the pope, Urban II,
and asked for aid from the west against the Seljuq Turks,
who taken nearly all of Asia Minor from him. At the council of Clermont Urban addressed a great crowd and
urged all to go to the aid of the Greeks and to recover Palestine from the rule of the Muslims. The acts of the council have not been preserved, but we have five accounts of the speech of Urban which were written by men who were present and heard him."
More here:
http://www.fordham.edu/halsall/sbook1k.html#The First Crusade