While there is the argument of not contributing to overpopulation, in my view anti-natalism is the application of moral utilitarianism to an absurd degree. I also think it can (not will of course) lead to eugenics policies. Indeed, a poor person birthing a child more immoral than a rich person. Certainly the rich child is much more likely to live a better life than the poor. Should we therefore be more willing to regulate the reproductive capabilities of the poor? I think this is where anti-natalism breaks down - forcing it on anyone, or creating policy to support it, is in my view will always be deeply immoral.
I am quite conflicted. On the one hand this is extraordinarily bad for American democracy, but there is a feeling in me that said democracy farce at this point.
I also believe that this will justify further violence from the right towards lgbt/left/immigrants etc. But would that happen anyway?