Everyone uses racist jokes against Jin in every battle I've seen... In fact, even on the old 106 and park battles they were making fun of him because of his race callin him "Mr. Miyagi" and tellin him to "deliver his food", and that was on regular cable tv, so I'm sure Jin's used to it. You gotta admit, Jin didnt bring it like he usually does in that battle... He didnt have hardly any good punchlines like he usually spits... Sirious' lines were alot funnier then jin's, racial or not and thats why he lost...
Jins still 1 of the best battle mc's ever, but even the best lose one time or another.