As someone new to exploring antinatalism my algorithm fed me this person's account and they're a staunch pro-extinctionist (see image attached)
Interestingly enough he claimed that antinatalism itself is absolutely immoral as it contributes to and prolongs suffering, that if humans were to die off there would still be immeasurable animal suffering etc. and its our responsibility to end all life before we terminate our own species.
He was arguing that it's our species responsibility to cause not just global extinction of all life on earth, but UNIVERSAL extinction and furthermore universal sterilization that guarantees life cannot exist in any part of the ENTIRE universe ever again. It just felt so unserious to me because his ideology in practice hinges on having faith that humans will ever be able to completely know and understand the universe.
Also, forcibly causing an extinction would mean stripping people/animals/sentience of their consent and autonomy. It bothers me because it would imply that we understand how all other life suffers and ignores that some life might be genuinely content to suffer.
My personal thought experiment is "If I woke up tomorrow and every person on the planet decided to not have anymore children" I would feel a huge relief knowing that human suffering would seemingly end. But to advocate for forcible extinction sounds like dangerous rhetoric to me and I was contemplating reporting the account. I mean god forbid a sick person sees his messaging and sees it as a sign/permission to commit a mass tragedy in the name of ending people's suffering.