Choosing not to reproduce because it's unethical to force more humans to live as indentured slaves under capitalism on this dying hellworld.... is basically the opposite of fascism?
That you also consider antinatalism cringe though makes me think you either just don't understand what any of these words mean, or that you're an Overton centrist who's just one little push away from becoming/owning a trad wife and feeding your offspring into the meat grinder to make billionaires happy.
IOF did this in Palestine not too long ago. Not with a nuke, but it was still a bombing for a gender reveal.