I obviously agree that it's still a lot of nurture, and that breeds can totally deviate from their original "characteristics" or intended purpose. My point was more that it's still completely different to humans because broadly speaking, specific dog breeds are much more likely to instinctively behave in a specific way. Whereas let's say the difference between middle eastern and white men is almost purely "nurture", and the nature part is usually purely physical.

And while yes, dog owners do have a huge influence on a dogs character, it's undoubtedly harder to teach a collie how to hunt and a terrier how to herd than it is to teach them the role they are actually known for. That's not true for humans, and his comparison is just incredibly uncomfortable because it implies a similar difference between say, pitbull and a greyhound. Which is not true.