I was a little concerned an article like this might validate eugenic arguments, but thankfully no
But, overall, breed is a poor predictor of behavior, and there is more variation within breeds than between them, scientists have found. Someone who wants a friendly, fetch-loving dog that doesn’t bark can’t bank on getting exactly that just by bringing home a Labrador retriever. “You may get exactly the opposite of that,” Dr. Lord said.
...
“There’s no breed,” Dr. Lord said. “They’re just dogs.”
This is part of what true fascism looks like