You do a disservice to true Christian history by suggesting that they were.
From the Concise Oxford Dictionary
crusade
• noun 1 any of a series of medieval military expeditions made by Europeans to recover the Holy Land from the Muslims. 2 an energetic organized campaign with a political, social, or religious aim: a crusade against crime.
• verb 1 lead or take part in a crusade. 2 crusading energetically campaigning for a particular aim.
— DERIVATIVES crusader noun.
— ORIGIN French croisade, from croisée ‘the state of being marked with the cross’.
I have a hard time imagining a Muslim carrying out a Jihad but calling it by a name derived from a word meaning cross, the Christian one particularly. I'm sure you can cite numerous examples.
There were Crusades by pagan orders of knights against other pagan orders of knights in what is now present day Lithuania/Estonia and surrounding areas during the 12th and 13th century. Teutons and other smaller orders while still Pagan, took on the language of the Papal Crusades to vie for political favors from Rome and other Christian lands... Sometime after the Teutons won, they slowly gave up the pagan religions and joined Christendom.