Question

why were holy wars fought ​

Answer 1

Answer:

Modern people often regard the idea of a holy war as a contradiction. Killing thousands of people and causing wholesale destruction seems to be as far from holiness as one can get.

But religion and war have gone hand in hand for a long time. Armies go into battle believing that God is with them, often after prayers and sacrifices to keep God on their side. In tribal cultures (including Biblical ones) when a people lose a war they often have to change to the worship of the winner's gods