Closed societies with much multigenerational inbreeding (demonstrated by polydactily and certain dieseases) do not demonstrate specific behavior patters further attesting that human behavior is not 'inbred.' Lots of other things are. So, there goes your hypothesis.
I think it's time for you to let go of that strawman.
No, my hypothesis does NOT go away. IF we can breed dogs for behaviors, then behavior CAN have a genetic base. And if it can be genetic in dogs, then it can in humans.
With dogs, it takes perhaps 20-30 generations of selection to get fairly reliable results. There is no reason to believe humans are different, except singling out a behavior genetically for humans is impossible - not because genes don’t work that way, but because we cannot do the tests to prove it.
Your ASSERTION that a chasm exists between humans and other animals would rightly be laughed at by behaviorists. And, your ASSERTION is a leap of faith of your own.
If you choose to make leaps of faith, why not do so in the right direction?