There are millions of different ideologies in the world. However, when it comes to religious ideologies too many believe there is only one correct solution. Religious violence and wars have been around for centuries, and they have never proved anything but instances of religious violence still occur regularly. Is eradicating all religion the only way to avoid this violence? Is it possible to coexist?
Just a personal opinion, I do not think religion is the cause of war. To be honest, I would rather say that religion is only one of the tiny factors that has led to war as the final outcome. I would suggest human desires is the main cause of war. That might sound too broad but at this point, I can confidently say that the continent or geographical location is the main reason(at least on Earth). Eg: Japan had been aggressive and active in the past because their land is always suffering from natural disasters. Another example is Mongolia, they do not have a stable home as they make a living by raising sheeps and other domestic animals. That is why China became an easy target as China has rich soil, developed agricultural systems and suffer significantly less natural disasters.
Ultimately, the significance of a war is to carve out new spheres of influence. Well, purely personal opinion though hahaha.