the 'realistic potrayal' thing is nonsense because it was in a voiceover, not in a encounter with a black character

i went to the shop to buy The Departed today but decided not to when i saw the £17 price tag ($30... wtf)

so i can't analyse it

from what i remember
1. he's talking about some gang-fighting history? was it directly related to his own emergence as a crime-lord
2. the opening montage was incredibly brutal. the bit where they executed the blindfolded couple on the beach, even in this day and age, was ultra-violent film-making. maybe they were using the racist speech as an emotional lever to make you hate the character.