FYI: the author of this piece is the eugenicist Cremieux who was responsible for using hacked data to attack Zohran Mamdani for checking Black and Asian on his college application.
What do they call this type of argument, again? Ad hominem?
If someone has a historical of unethical behaviour it's reasonable to want significantly more evidence for their claims.
Perhaps you could share what this person's history of unethical behavior is? Lasker is called a eugenicist by the GP and in the Wikipedia article, but when I read the cited sources, they look a lot more like opinion pieces pushing a viewpoint rather than hard news.
Then just show which claims need more evidence in their articles.
Are you referring to parent's or TFA's 'argument' here?