On Monday night, fiercely pro-life advocate Obianuju Ekeocha, a committed cradle Catholic born and raised in Nigeria who has a BSc in Microbiology from the University of Nigeria and an MSc in Biomedical Science from the University of East London, was attacked by documentary film producer Tariq Nasheed, who is also black, after Ekeocha criticized Nasheed’s mean-spirited attack on Callista Gingrich, President Trump’s choice to be U.S. Ambassador to the Vatican.

In one of the epic takedowns of racism seen in recent years on the Internet, Ekeocha leveled Nasheed after he implied she was a supporter of white supremacists.

Here’s how the firefight started, with Nasheed targeting Gingrich:

Ekeocha tried to encourage decency in public discourse:

Nasheed then doubled down:

Ekeocha tried again to be reasonable:

Then Nasheed started his race-based attack:

Ekeocha pointed out the obvious:

Nasheed persisted:

Ekeocha, dignified, responded quietly:

Nasheed decided to say what was really on his mind:

Okeocha replied logically:

Nasheed, already lost in the weeds, chose to find even more murky moral ground:

Then Ekeocha, finally fed up, launched a series of tweets in a memorable put-down:

H/T Twitchy