Hi ahana666,
There is not to much info out there about Josef Mengele, but some revisionist articles that are well written in favor of him and his character. Here is a link to an article that you might find interesting.
https://www.ihr.org/jhr/v06/v06p377_Weber.html
Here is a link to a book about the lies of Josef Mengele's assistant. The lies are debunked in the book
https://barnesreview.org/product/an-auschwitz-doctors-eyewitness-account-the-bestselling-tall-tales-of-dr-mengeles-assistant-analyzed/
This last article is quite long, but detailed and enjoyable, which will help you to understand that Mengele was not a monster.
https://jan27.org/the-making-of-a-monster-how-jews-created-the-mengele-legend/
Hope these help. Hail Father Satan