Responses

You’re right
i read the spoiler from the tread above, some very poor genetic culture went inside the background of this story : it seems they truly are inbreeding humans, they became dumb due to consanguinity
It’s beyond ridiculous, also they cross breed humans and beast, but the offspring are just males : in the real world, even if some rare cross breeding work, it’s always at the cost of genetic defects, and most often sterility
Well it’s not like one read this kind of story to get smarter, i guess ^^;;;
Breeding with humans with severe genetic diseases? ! LOL Even Beastmen doesn't learn their mistakes in term of "breeding". They would pass on those defective genes.