It is obvious that the real reason behind the Crusades is .

Robbery.

Explanation:

And if the pope called for a crusade to be waged to free the holy land from the infidels, a huge number of participants used the opportunity to plunder. Passing through many lands to Jerusalem, many soldiers plundered the population. A large number of valuable relics were stolen on the way of the Crusaders to Jerusalem. The Venetian Republic, which provided the transport of many crusader soldiers, used this opportunity to charge for the service and get rich. So there is a material benefit in the background.

answer; during stalin"s rule, many mothers told their children that he was the greatest thing to ever happen to russia;