What do you get if you cross Arnold Schwarzenegger with George Zimmerman? Arnold Shootzenigger.
I feel pretty horrible hearing such a racist remark against black people.
No, it's all just a joke. I like to use big words and joke because it shows how stupid the other side is.
Using the n word in a joke is very offensive and universally uncalled for in society. Slurs like that can be very hurtful for black people to hear and are emotionally upsetting and therefore should not be used. While it's okay to make jokes using the names of celebrities, it would be a really good idea not to change them into slurs as that could get you into a fight if another person hears it and gets upset enough.