…Said the horny rat in an overcrowded cage

…Said the Easter Island native

…Said the XX century boomers

Would you elaborate on your thought? Why questioning the demography is “enemy of mankind”? Is there other subjects/sciences we should avoid completely to be friends with mankind?

They'll breed themselves out, so it should work itself out over the long term.

A half billion years have passed since the invention of sex and they're still here. How long term are we talking?

I'm sure there were anti-natalist groups in the thousands of years of human history but well they weren't so numerous a 100 years ago, and they probably won't be so numerous a couple of hundred years from now either.

None of the species that have gone extinct (which are over 90% of all species that ever existed) reduced their rates of reproduction voluntarily.