Populicide

In 1793, the capital vvas menaced vvith the dreadful ſcourge of famine, and if vve are to believe ſome ſpeculative men, this originated in a populicide conſpiracy, on the part of the then exiſting government.

Source: wiktionary

Less extensively mischievous, tyrannicide would be less flagitious than populicide; murder of one, though he were a Secretary of State; or—but imagination must stop here—than murder of a promiscuous multitude of unarmed men, women, and children.

Source: wiktionary

[S]ome of them, the worst of all, take their stand in the highest ranks of society, rave in the senate, bluster in the council of the nation, shine at courts, and everywhere proclaim falsehood to be truth, vice to be virtue, apostacy^([sic – meaning apostasy]) to be consistency, populicide to be patriotism; and while devoting the whole of their energies to blind, corrupt, and enslave mankind, they pretend to be the instructors, the monitors, the benefactors of the human race!

Source: wiktionary

I mourn for Mr. [Abraham] Lincoln, as man should mourn the fate of man, when it is sudden and supreme. I hate regicide as I do populicide—deeply, if phrenzied; more deeply, if deliberate.

Source: wiktionary