This context makes it worse. I was imagining a bunch of different framings that would make it sound thoughtful, but I've literally heard the same thing from Klansmen in Arkansas. Literally, not figuratively.
That last sentence is a symptom of people thinking that the only important issue is whether they're good people or not. He's saying that saying dogs are stupider than humans is not the same as hating dogs. Who cares what he hates? The question is who he hires, and who he gives the benefit of the doubt to. Not hiring dogs isn't hating dogs either.
I don't understand you position. Are you saying the question of if dogs are stupid is irrelevant, off limits, and if you know the answer it is unethical to say it?
Suppose dogs (your choice) are stupider. How should someone behave?
That last sentence is a symptom of people thinking that the only important issue is whether they're good people or not. He's saying that saying dogs are stupider than humans is not the same as hating dogs. Who cares what he hates? The question is who he hires, and who he gives the benefit of the doubt to. Not hiring dogs isn't hating dogs either.