Well in fact the Idea of what a crusade was wasn't anywhere close to being settled in 1095. The Vatican had at the time gotten around with the ideas of just war, and various benefits to those who fought in the reconquista, but not a full blown crusade.
In period they were known as armed pilgrimages, and not crusades.
The real establishment of what in fact the spiritual benefit even was (a blessing, a penance, an indulgence, ect) weren't really laid out until Pope Innocent lll really delved headfirst into the Idea. In fact the earliest uses and meaning of the term Crusade simply as a drive to create a state centered upon he city of Jerusalem.
And Just Wondering, is the source period? If so, had he personally been on Crusade, or was he simply writing a form of Documentary? If not, credentials and further examination of material. I am interested in this, but I would like to see to the sources credibility first.