White guys saying the N word and being gangsta. There is nothing ever cool about a white guy pretending to be ghetto. Yes I'll include Eminem and I don't care if he's been given the pass.
In Django sure but I would not say so for Reservoir Dogs or Pulp Fiction. Hell, Samuel L Jackson specifically told him not to say it in Pulp Fiction. It does not make sense for the scene either. A suburban white dude is going to say it multiple times to a black assassin who just got done killing people? His character is not supposed to be a bumbling moron.