I'm going to make a racially insensitive joke to one of my close friends
Is the joke really offensive ?
Yes, it is. It's very racist.
You shouldn't tell people racist jokes. Racism is not right. You shouldn't say those things to your friends.
The only people who are racist are the people who get offended by these kind of jokes.
You're wrong in thinking so. If you want to keep your friendship you should not make racist jokes in front of him. You need to read history of racism and how it affected minorities, that'll make you aware about the issue.