I might note that that I considered that part of the analogy to be flawed in the extreme. Modern society *is* genocidal, it's a darker side of modernity than most people like to think. Genocide, however, required the ability for one society to outright exterminate another as opposed to conquest and enslavement. The previous model was to move in, destroy the local political leadership, instant new-peasantry.

Genocide IMHO requires a degree of both organization and the ability for the perpetrators to do without the victims of the genocide itself. That did not exist prior to the Industrial Revolution. The main exceptions to this were what happened to a lot of the Indigenous Americans in the early phases of colonialism on this side of the Atlantic. However that genocide was due to the lethality of slavery and the epidemics, more of a byproduct of the new civilization than its intent.

The result, however, was close enough that the distinction is purely an academic one.