Justification

Xayuka, this eldest son of the chief of Kazan is not as good as his brother in fighting.

And in managing the tribes, he is inferior to all of his brothers

He did not cultivate relationship with the elders or the Great Warriors that lead the tribe.

He is not loved by the warriors and is feared by the common people of Kazan.

The only reason he is not that infamous is precisely because the chief of Kazan had always manage to keep him under control.

However, when he dies, it is clear to everyone that Xayuka is not someone who could lead the tribe.

In a world of great contention, the biggest sin is incompetence.

Dama is cruel.

Probably he is even crueller than Xayuka. But no one among the Esbizuk tribe would dare challenge him or question his legitimacy

And there is no contender for this spot nor would any of the old warriors would raise a contender to fight against Dama

Why?

Because in the end, Dama is competent.