It's damn funny. But a site full of white people like HN will be way too uncomfortable to laugh at this.
Your remark, on the other hand, not so much.
That's good. I'm glad we can all enjoy laughing at minorities together then.
Your sound like you see yourself as a non-racist, but you probably don't realize that you are actually being racist yourself by making these comments.
Just because black people specifically are underrepresented in SV doesn't mean that it's (racially) non-diverse.