You should be grateful when someone celebrates you.
Marlon is at the Academy Awards ceremony where he's just been given an Oscar.
Marlon wants to respond to the prize.
Marlon graciously accepts the Oscar and thanks the academy for recognizing him in such a special way.
Marlon tells the audience that he's not accepting the gift because of their mistreatment of Native Americans and walks off.
The audience is grateful that Marlon recognizes their appreciation for him and clap happily.
The audience is aghast at Marlon's indifference to their honoring him and is angry and sad.