I agree that race has primarily been used as a divisive social construct, largely to distract labour from the only war that counts, the class war. However, there are important medical difference that can occur. Off the top of my head for example I belive that black and white people have different responses and outcomes to certain heart disease treatments. Not acknowledging those difference and accounting for them has lead to worse outcomes for black people.

It is in fact the farcical nature of using race as a division that lends the humor to a dark sarcastic take on this.