[dekhn]

Um, US has its own sad history of eugenics (predating Nazi germany) that was unfortunately tied very closely to the mainstream scientific establishment. https://www.cshl.edu/archives/institutional-collections/euge... This included advocating for "sterilization of defectives".

And of course we mustn't forget the reaction to He Jiankui, who claims to have created the first permanently modified humans, and the response in China was to jail him and fine him. It's not just the West.

Gene therapy done in a medical setting where society has had a chance to understand what's going on isn't really eugenics, or is a form that isn't "bad". It's different from "sterilize the defectives" and "X people are Yer then Z people", especially because the people doing this have consulted extensively with bioethical experts and have also subjected their plans to scrutiny by the larger society.