I'm not sure how DM giving his money to SB would have anything to do with Abro does with her money. Was Abro going to make enough money off of the book to support SB? Because honestly, I think that would be a karmically wonderful thing, and I don't see anything unethical about that at all. I do feel that if someone was going to write a book about people who are only famous for murder, that some portion of the proceeds should naturally go to the victim's family, or in this case, the victim's charity. But that's just my opinion.
And until we hear from AB herself, it's all kind of a moot point to defend her or condem her, in my opinion, we don't know where she stands on the subject. She may be actually be proud of the percentage she is giving to the victim's charity. I have faith in humanity still, and hope that possibly this could be the something positive that comes from all this waste.
All my opinion only.