My late twin friend Otto Klein, who Mengele experimented on, certainly knew her. In November 2000 I took a day trip to Auschwitz from Geneva with Otto and 150 Swiss schoolteachers, organized by https://cicad.ch/ to teach Swiss teachers how to teach the Shoah.

Otto believed in no appeasement of jihadis and did not support mass Muslim immigration to Switzerland.

I've written two articles about him:

https://medium.com/lessons-from-history/seeing-civilizations-thin-red-line-at-auschwitz-with-otto-klein-mengele-twin-survivor-d4cd8c3fb297

https://medium.com/lessons-from-history/palestinians-holocaust-remembrance-day-message-to-my-late-friend-otto-klein-a-mengele-twin-13f83b6a08a4

Darvas expresses no condemnation of Israel's war of self-defense against genocidal jihadi Palestinianism. So I fail to see how the article supports your argument.

Hamas fighters and their Gaza civilian supporters expressed and livestreamed ecstatic delight in cruelty and sexual abuse of Israeli women and girls that would have surprised even Hitler's SS. There is no Israeli equivalent to the parading of Shani Louk's half naked body in a pickup truck to be spat on and beaten by an ecstatic Gaza crowd.