Bill O’Reilly, the tumescent personality of Fox News, said on his Friday show “Robert Reich is a communist who secretly adores Karl Marx.” (This came after Fox News’ Neil Cavoto called me a “sanctimonious twit” for suggesting the rich should pay more in taxes.)

O’Reilly’s accusation is odd, to say the least. If we were living in the 1950s, amid Senator Joe McCarthy’s communist witch-hunts, the claim might have some bite and cause me injury. But these days it’s hard to find a full-throated communist anywhere in the world.

O’Reilly’s accusation isn’t even logical. How can he know if I secretly adore Karl Marx, if it’s a secret?

For the record, I’m not a communist and I don’t secretly adore Karl Marx.

Ordinarily I don’t bother repeating anything Bill O’Reilly says. But this particular whopper is significant because it represents what O’Reilly and Fox News, among others, are doing to the national dialogue.

They’re burying it in doo-doo.

O’Reilly based his claim on an interview I did last week with Jon Stewart on the Daily Show, in which I argued that because America’s big corporations were now global we could no longer rely on them to make necessary investments in human capital or to lobby for public investments in education, infrastructure, and basic R&D. So, logically, government has to step in.

Since when does an argument for public investment in education, infrastructure, and basic R&D make someone a communist or a secret adorer of Karl Marx?

Obviously, O’Reilly has no interest in arguing anything. Ad hominem attacks are always the last refuges of intellectual boors lacking any logic or argument. (Whoops, I think I just stooped to name-calling. Sorry, Bill.)

Yet this is what’s happening to all debate ...