His Intention

Rukari is a man of honour and loyalty, deeply committed to his people and their traditions. 

He holds steadfast to the beliefs and values instilled in him by his Marynku heritage

But what Aeryon has done is none of that. If it was him that attacked the Xewa tribe and the Ghar tribe and he had won such a beautiful victory like Aeryon did, he would slaughter every one of them, man or child and none shall be spared.

Rukari thought is no different from any other Marynku chieftains.  Because to them it is normal for the defeated to die. 

What Aeryon had done is very unusual. Of course, it happens sometimes but rarely an entire tribe was spared. 

In most cases, the most outstanding of the hors riders or the warriors, the heroics ones would stand out and generous chief would spare the lives of these warriors and kill the others. 

This is the limitation of Rukari.