References to slavery are apparently only wrong or inappropriate when black conservatives make them.

Not long ago, Dr. Ben Carson, a world-renowned retired neurosurgeon who worked at Johns Hopkins Hospital in Baltimore, called the Affordable Care Act, also known as Obamacare, “the worst thing that has happened in this country since slavery.”

Left-wingers of all races couldn’t wait to pounce on Carson for the remark, even though he elaborated. During his early October speech at the Values Voter Summit, Carson added that Obamacare "is, in a way, slavery, because it is making us all subservient to government, and it was never about health care. It was about control.”

Later, during an interview with black liberal journalist Roland Martin, Carson said, “This nation was founded on the principle that it would be a new type of nation, that was for, of and by the people.

"A constitution was put in place that would assure that the people remain at the pinnacle of power and that the central government would never reach the point where it had control of the people. [Obamacare] fundamentally changes the relationship.”

The explanation didn’t mollify Carson’s gaggle of Leftist critics, who are so committed to a huge, meddling federal government that they think its controlling the people is actually a good thing.

Liberal and left-wing blacks don’t have a problem with references to slavery when they make them. Such references are usually done for two reasons.

One is to bust the hump of some white person, or a group of white people, somewhere.

The second is to castigate some conservative blacks as either Uncle Toms or “house Negroes.”

And lately, even liberal blacks have been the targets. Note Cornel West’s recent attacks on Al Sharpton for being a so-called “house Negro.”

Cloves Campbell Jr. is the publisher of the Arizona Informant and the chairman of the National Newspaper Publishers Association. The latter is a group of black newspaper publishers; the former is a black-owned newspaper in Arizona.

I don’t know if Campbell is liberal or conservative, but he recently played the slavery card in a way black liberals and leftists have come to appreciate: to bust whitey’s hump.

Campbell’s targets are the Washington Redskins, in particular, and NFL owners and executives, in general. His remarks are part of a news story on

“The chairman of the National Newspaper Publishers Association, a federation of more than 200 black-owned newspapers, says the Washington Redskins team — under fire from a Richmond, Va. publisher — is in sync with the entire National Football League in its apparent oppressive treatment of black businesses and consumers,” the story reads.

Hazel Trice Edney, who wrote the story, didn’t put the word “oppressive” in the quotes it deserved, so I guess I’ll have to do it.

This is a quote directly attributed to Campbell:

“It’s almost a slave mentality. They put us on the field and we entertain the master but we’re not reaping any benefits from the business side of it.

It’s not just the Redskins. If you look around the country, you see the NFL as a whole pretty much neglects black businesses and the black community.”

I’m pretty sure Campbell meant to say “slaveowners’ mentality” or “slave master mentality,” but that makes his remarks no less offensive.

Why isn’t it considered racist for Campbell to compare NFL owners and executives to slave masters?

“They” put “us” on the field, Campbell said, as if those black NFL players aren’t playing because they want to, and getting paid millions to do it. Campbell’s slave analogy is absurd on its face.

But since it was done to exploit white guilt and extort money from white businesses, that makes it perfectly fine among black liberals and leftists across the land.

Gregory Kane, a Washington Examiner columnist, is a Pulitzer Prize-nominated news and opinion journalist who has covered people and politics from Baltimore to the Sudan.