How Did Genghis Khann's Brother Provoke Him With A Fish?

Born Temujin in the 1160s in Mongolia, Genghis Khan went on to become one of the most feared and respected rulers of all times. In his years of reign, he carved out a Mongolian empire that stretched from the eastern corners of China right up to Eastern Europe. However, like most great men, Genghis Khan had to live through a period of adversity before assuming the mantle of greatness. His father, the chieftain of the Kiyat tribe, was murdered by the Tartars when Genghis Khan was small, and his family banished from the tribe. Genghis Khan lived in the wilds of Mongolia along with his mother, brother, and two half-brothers. It is from this period of his life that the story of Genghis Khan, his half-brother, and the fish originates.

Apparently Genghis Khan's half-brothers, Bekhter and Belgutei, always treated him and his brother Kasar badly. Genghis Khan was hot headed by nature even then, and one fine day he really lost his temper when he realized that his half-brother Bekhter had stolen a fish and a lark that he and Kasar had managed to hunt down. The enraged Genghis Khan shot his brother down with a volley of arrows, and thereafter earned the lifelong loyalty of his remaining half-brother Belgutei.

He stol it and threw it away, wasting hte precious food.

U missed the part where his half bro slapped him in the face with the fish,
then he threw away the precious food