BJ has shown Rory nothing but disrespect. Read all of his interviews and tweets. He's constantly knocking the kid. Why should Rory show respect to someone who clearly doesn't respect him?
And so what if Rory supposedly had minor issues with Nate Diaz early in the fight? This is the same Diaz we now all champion. That and BJ Penn isn't Nate Diaz. Penn is tired and done. I'll sig bet to that.