i think there was initially a legit argument, but once the team huddled b4 leaving the bench, it looks like they turned the words into motivation.
its understandable and normal.....there was frustration and they are close with one another. chaulk it up as 2 brothers arguing, but have each other's back and dont hold a grudge.
this happens a lot more than one would think, its just not always televised.
<i could be dead wrong about this, but its my interpretation>