He's showing he is all hat and no horse. When asked specifics, he deflects and attacks everyone.
That’s typically how stupid people argue. There’re not intelligent enough to come up with a real response.
I know plenty of intelligent people who argue exactly that way. Because there is no valid response to the point, they can't make one. So they deflect, obfuscate, change the subject, attack something unrelated.... Sometimes repeating earlier versions, only louder.
Just because someone is smart doesn't mean they are right, or logical. Something about Gore's oxen or some such thing.....