If you really think one has to be liberal or a Jew or secular to hate slavery, your problems go much deeper than anybody suspected.
Fogel was a communist for at least eight years. Maybe, like Eugene Genovese, it was capitalism that he hated most.
I do not think that. What I think is that Liberals are far more likely to "virtue signal" about slavery than are anyone else. Putting scare quotes around "owners" is a form of virtue signaling in my mind. It's an effort to make the reader aware that the writer does not agree with this characterization.
Fogel was a communist for at least eight years. Maybe, like Eugene Genovese, it was capitalism that he hated most.
Some of the best conservatives are reformed socialists/communists. They sometimes wake up and realize how blind they have been.
Evan Sayet, Roger Simon and others comes to mind.