Could you explain that? Absent other context (i.e. a broader collection of works demonstrating some bias) I'm not understanding how this poster can possibly demonstrate "offensive racial and cultural bigotry".
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.