Why were the crusades so dangerous?

The Crusades were dangerous due to the intense religious fervor that fueled conflict between Christians and Muslims, leading to widespread violence and brutal warfare. The campaigns often resulted in significant loss of life, not only among soldiers but also among civilians in the regions affected by the battles. Additionally, the long journeys across unfamiliar territories posed logistical challenges and risks, including disease and ambushes. This combination of religious zeal, military conflicts, and perilous conditions made the Crusades particularly hazardous.