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FWIW that's a post I made myself - the German embassy in Tokyo put up a series of posters explaining some German words, and that's the image they chose for "schadenfreude".
Schadenfreude does not require both parties to be different in some meaningful way. The poster confuses schadenfreude with cultural bigotry in which schadenfreude may play a non-essential roll.
Also, people on this site regularly engage in personal attacks. I'd suggest you read the comments on many posts more carefully since you've appointed yourself to be the conduct police.
What a sick little mentality, that of viewing all human interaction through the lens of what ethnicity or race is shown and how that frames any context.