Microblog Memes

The reason black is used as the stand in example is because it forces you (assuming you're not racist) to see the issue with generalizations that you're ignoring because the original group is culturally ok to hate, while black people are not culturally ok to hate. It's to make you see your own prejudices, and to do so uses the most glaring example that has been widely publicised since the 60s at least. Could they slot in Inuit instead of Black? Sure, but that doesn't have the same impact when you read it. And you're supposed to be upset about it, but not at those forcing you to look inward with the comparison, rather at yourself and those that make you ok with holding your prejudices.

Those examples are used because there is plenty of well-known racism and religion...ism (forgot the word) discussion along those lines. It's like asking why people use squares and circles as their go-to example shapes, it's part of the cultural consciousness. They're using those examples because they know people consider them to be racist, and using that to imply that "men are rapists" is similarly sexist. It's easy to twist this behavior into something problematic, but it's really not.