I mean the whole point of that scene was that Brent was in the wrong, "it's a compliment if anything".
I think the issue is the song is embedded in Lukaku's race and they are saying why does it have to come back to that? It doesn't matter if it is a positive stereotype.
I don't find it offensive but I suppose I'm not in a position to judge that being a white man with a 26 inch cock.