One of Darwin’s selective forces it STUPIDITY. If not for modern meds Darwin would have taken out these kind of folks out of the gene pool some time ago.
Consequences of sin. Darwin had no concept of aught beyond the material universe. His musings omit free will on the part of humanity.
To be blunt, I believe that these fools are just setting themselves up for removal if they keep this up. AIDS kills either way and HIV can last for only so long. I am certain that these kids have all sorts of diseases incubating in their nervous systems and it’s just a matter of time until the disease flares up. Meanwhile, they’ll pass it to their future spouses and kids in the womb.