As far as the sacking of Constantinople is concerned, Innocent III was furious with the actions, as evidenced in this reprimand to the papal legate:
fordham.edu/halsall/source/1204innocent.html
The Fourth Crusade was a complete mess from the start and after the sacking of the city of Zara, Pope Innocent III excommunicated the entire Fourth Crusade. (He later granted absolution to the Frankish contingent, but upheld the excommunication of the Venetians).
You probably know that there was never a crusade against the Jews, but that abuses–even savage persecutions—of Jews took place, especially during the first two crusades and mostly by rabble, (as opposed to knights). The Church got a fairly good handle on it after that, and I’m sure there are some papal letters where Urban, Gregory, or Eugenius sharply criticize such actions.
Various popular movements arose occassionally and were called “crusades” but were not official movements by any means. One such group began in Normandy in 1320 and marched south, intending to “help” the Holy Land, causing trouble wherever they went. Among other misdeeds, they attacked Jews, and Pope John XXII threatened to excommunicate anyone who supplied this rabble with food and help.
I could probably hunt down several examples of papal letters if needed. Meanwhile, I encourage the reading of these two articles: one by Jimmy Akin and one by crusade historian Thomas Madden.
Crusades 101:
ignatiusinsight.com/features2006/jakin_crusades_sept06.asp
Crusades myths:
ignatiusinsight.com/features2005/tmadden_crusademyths_feb05.asp