He got carried away and expected retribution from the elders and his tribe leader.
He knew it wasn't a wise decision to make an enemy on a remote island where no one could help him.
But it was the pent-up rage since Drake infiltrated their quarter to kill them, when Koji underestimated him without thoroughly assessing him, and when Suhas made fun of his passion, that's what made him act that way.
It might be nothing for others but what they did to him was what he despised the most.
Cheating to win, underestimating an opponent without fully knowing them, and making fun of others instead of appreciating others' passion.
The thing is, he's mostly letting it slide as he appears to be a calm and collected individual, always thinking about what's the best action in the present situation.
But the truth is, he's not letting it slide completely.
He'll think about it after.