You're being disingenuous, in not fully describing Morning's assertion. The assertion, fully described, is that "race is a social construct" is a minority position, and one that sociologists claim is a universally held among scientists at large.
This is deeply mistaken claim by the sociologists, and to me it's evident why the consensus emerged within the sociology field around this erronuous belief: it's a manipulation tactic, to give the "race is a social contract" claim an appeal to scientific credibility.
And it worked! Only 15 years later, and the main scientific institutions are now arguing for a broad exorcism of the concept of race.
>>But it was clearly never "an idea of social justice ideology, not of science"
Given the following facts, I think there is a preponderance of evidence that it is an idea of social justice ideology, not science:
* the well-documented extreme-left wing bias of the sociology field
* the economic interests those with sociology degrees have - due to the occupations that sociology degrees are amenable to - to propagate left-wing political ideology and the government programs that are associated with it
* the lack of rigor in sociology, which makes it less scientific, and more political/ideological, than other scientific disciplines. This lack of rigor is reflected in the pervasiveness of the erronuous belief about "race is a social construct" in sociology field, that Morning references
* the until recent general rejection of the "race is a social construct" idea in the harder sciences for which race is relevant: biology and anthropology
The best explanation for the coincidence of all of these facts, is that "race is a social construct" originated in the left-wing grievance ideology promoted by the political left, and that the sociologists, due to their alignment with this ideology, created a dogmatic commitment to this belief in the other scientific disciplines, by linking the rejection of this belief with vices like racism.
>>that reasoning around races was used to justify things before the act, but rather that by attributing ideas like "genetics explains people" carries historical consequences.
The answer is not to pretend race doesn't exist and/or has no usefulness as a category. The attempt to extirpate race from the sciences, in an attempt to minimize racism, is just delusional utopianism, that in its neuroticism, totally ignores the collateral damage to various scientific frameworks, of such a drastic and far-reaching conceptual re-engineering.