I think it'd depend on what the fan said as well. Utah fans have started to build a rep with some of their language - particularly of the racist variety. .
it doesn't depend on anything
You can call me any racial or derogatory slur in the book. I respect peoples freedom of speech, so I'd never threaten anyone's life or physical well being. If someone threatened my life, then id have to defend myself but words like those aren't threats
This is just another unprofessional moment in the life of Westbrook, guy with history of being trashy with fans and media