I know two things about Kazakhstan: it’s over by Russia and Borat is from there. I can add a third thing to my list: nine year old kids will brawl in pure mayhem for about 20 seconds, but when grown-ups start yelling at them, they’ll pick up their toys and shape up.
I won’t pretend to know anything about Borat’s people, so I’ll take the word of an older sibling of one of the players who posted the video:
“This is my 9-year-old brother’s team Kokshetau – Burabay (green) fighting against the team from the capital city of Kazakhstan – Astana (white). Even though team Astana won against Burabay 5:3, they started talking crap to their opponents during hand shakes; so the capitan of Burabay’s team could not just let it go and started the fight.”