> I thought that the current consensus was that races don't really exist.

Races do not exist biologically[0][1], but they do 'exist' as a social construct[2][3][4]. And I second your second sentence :)

[0] https://www.youtube.com/watch?v=ZrKrGkgeww4&index=4&list=PLy...

[1] https://www.scientificamerican.com/article/race-is-a-social-...

[2] https://en.wikipedia.org/wiki/Social_constructionism

[3] https://www.theatlantic.com/national/archive/2013/05/what-we...

[4] https://www.psychologytoday.com/us/blog/without-prejudice/20...

Depends whether you’re talking about the consensus among critical race theorists or population geneticists.

The latter have no problem with dividing different people into groups based on ancestry based on what continent their ancestor came from though the word race is passé.

https://en.wikipedia.org/wiki/Ancestry-informative_marker

Well, my comment was an answer to an answer to an answer. Someone complained that previous comment generalized about groups of persons from a certain region and then someone else objected that people from a certain region does not make a race. So I was trying to point that racism is a perfect term to define discrimination based on (perceived or constructed or real) groups you would belong to, including, like in this case, in where you come from.