I mean, none of the Space Nazis’ actions are meant to be comfortable… same with their regular genocides. We’re not meant to be fans of villains’ actions.
I get that it’s illustrating something awful in the real world, but that’s kinda the point. That’s how fascist armies are built. The ideals of fascism are kinda childish, few reasonable adults choose it. It’s only through indoctrination and childish needs for vengeance that people choose it. So, kidnapped as physical children or mental children, it doesn’t feel like as big a difference to me.