Are you just intentional dense? Using monkey as a slur against blacks is centuries and centuries old.
This reminds me of a story from over 30 years ago when I was a kid growing up in New Jersey. One of the mall Santas got fired because he called a kid "a little monkey". Well, he called lot's of kids that, but it wasn't really an issue until he called a black kid that. Poor old Santa. He needs to realize that you can't just go around turning a blind eye to race and color and treating everyone the same. Being impartial is racist.