Background. Libs may be indirect about it: talk "climate change", "family planning", "compassionate suicide" (pushed on you by Health Canada, NHS etc.)
Or libs may be direct: groups like Voluntary Human Extinction Movement (VHEMT), Gaia Liberation Front (GLF), Extinction Rebellion, Deep Green Resistance.
Austin Socialists shown below, are more direct.
"Natalism" is: mere belief that people should have kids. Families. To continue human life.
& they're against it.
These hate-filled mask-wearers
- say, it is Nazi 

note: actual, historical Nazis were pro-abortion; sometimes anti-natalist & environmentalist.
So these Austin libs are ignorant, too 
One ill-conceived sign crosses out "Natalist" and states, apparently as its desirable alternative, "Eugenicist"
another historical-Nazi position.
So they're historical Nazis who -pose- as anti-Nazi, in weak effort to throw you off.......Much too common, with libs these days.
But wait - If they hate human life (& carbon emissions), why don't they kill themselves?
Libs like to pay the bill with -other- people's lives.