Defend the fish?

[ChuckyB]

Sitting 2/4 full-ring at PP. One guy draws out a straight after a KQQ flop. He was up about $100 so far and was seeing 50% of the flops...just the player I want at the table.

Well, the guy who lost started berating the winner for drawing out "...when I could have had a boat on the turn!". The winner typed something about "apologize or I'm going to leave."

Would you/do you jump in to try and keep the fishy winner at the table?