like with most things, it's all about your intentions. if someone bumps into me by accident i'm not gonna break their jaw for that, they didn't intend to bump into me, i'll let it slide with a simple "my bad bro". but if someone purposely bumps into me and their intent is clear I'm a wash him ASAP. same with n!gga, if a white dude says n!gga around me in the way we all throw it around I will tell him I don't like it and ask him to chill with that, I'd come respectfully because his intentions weren't harmful. now if he's calling me a nikka and it's clear the intent is some racial shyt then he's going to the hospital. it's only a big deal if the intent is hurtful, if not I still don't want a white person saying it around me but it aint big to the point i'd make a scene, just a 'pull to the side' convo would suffice. white people admire black culture bro, they wanna be down, them throwing that word around is just them attempting to be down, that doesn't necessarily warrant a foot in the ass i don't think. i still never heard one say it though in real life, never