I think the cultural differences are not playing out well for us North Americans. I kind of get where Nog was coming from, and why he kept pressing the issue.
Personally, I liked it. It says a lot about the Brazilians and honor!
Regardless, Nog made his point, and Vinny knows it. As for who would win, Nog would eat Vinny alive. Vinny may have a blacker belt, but he has NO MMA at all.