The most famous passage from that speech, one which many Obama supporters can still recite by heart, no longer fits the Democrats’ militant approach to politics, however, and would be seen by today’s progressives as apostasy.

“Now even as we speak, there are those who are preparing to divide us, the spin masters and negative ad peddlers who embrace the politics of anything goes,” he said. “Well, I say to them tonight, there’s not a liberal America and a conservative America; there’s the United States of America. There’s not a black America and a white America and Latino America and Asian America; there’s the United States of America.”

It would be reassuring to hear some of those sentiments expressed in this year’s Democratic Party convention keynote address. But doing so would constitute an explicit rebuke of liberalism, circa 2020. The animating ideological force on the left is the Black Lives Matter movement, which holds that there is most definitely a black America and a white America.

According to BLM’s view, the former is a community of people who have been (and continue to be) victimized in all manner of ways by racist systems set up by the latter, and America will remain an unjust society until those structures have been completely dismantled. There is no tolerance for dissent of any aspect of this ideology, any who disagree are shouted down, silenced, and labeld a bigot.