If you're thinking about wearing a costume to a costume party, and you're wondering whether or not it's offensive, there are a short list of questions you should ask yourself before donning the outfit.
At the top of the list should be, "Is the costume blackface?" If the answer is "yes," then you should never, ever wear the costume. It's that simple.
Apparently French soccer player Antoine Griezmann never got that memo, because he thought the best way to dress up as a Harlem Globetrotters basketball player would be to go in blackface, complete with a faux afro.