>>512746821 (OP)
>miscegenation = mental degeneration
This is plausible, the human brain is complex, haphazardly mixing together two brain designs that evolved even slightly different will certainly not function properly. This is a possible explanation for why ashkenazi jews(European/middle eastern), and mixed race people in general, have high rates of mental illness, and why Mexicans and South Americans (part European part native) have IQs on par with niggers.