Pol Pot? That piker - he only murdered a couple of million. No way; these guys ar aiming a tad bit higher - like up in the Stalin-Mao range of 10s of millions.
Back in the 60s the Weather Underground put down a marker for 25 million after the re-education camps were finished; so toady that would be in the 40-80 million range. Pol Pot - Piffft.
Abortion has killed 50 million native Americans.
About the same number we have imported illegally.
So it was never about keeping the country’s population down.