There is a 4th option: you are a dog that barks and you don't want to say anything. Woof Woof. What was your point, doggy? Try to express yourself so maybe I understand you.

This is the only somewhat non-barking of yours "you... think people fight because of some ideology". To that I can answer: humans fight on this planet because of many reasons, most (if not all) of them are nonsensical/not-necessary based on artificial borders, ideology, lack of resources (despite having a global abundance of stuff), and so forth. Most of the time it is a problem of trade. Here I wrote 2 main books about it:

The Money Game and Beyond tromsite.com/books/#flipbook-d…
The Origin of Most Problems tromsite.com/books/#flipbook-d…

WOOF! :)