1st way to delete your OG comment.

2nd you are still ignoring the premise. The premise is that we are all eugenicists in inconsistent ways.

3rd, this is not about cultural taboos surrounding incest, it is about the genetic effect of incest, which is very often birth defects.

4th This is an apology of eugenics and not Nazism. this article is ultimately making a humanist argument for eugenics by arguing that it is basically mainstream medicine, especially in terms of abortion.

5th please read the entire article. I didn't even write it, I just think it's interesting. You seem to want people to to dismiss it because it appears to you an apology of Nazism. It is very clearly not.