Adoption issues definitely mess with people's heads. It creates a lot of insecurity problems. One kid that I went to school with was adopted and he seemed to bring it up always in some way it was always on his mind almost like blacks hung up on race work race into everything and see things through racial glasses.
Jeremy's actions though are no different than actions blood children have done. Killing siblings and parents to get the entire fortune because one is lazy and doesn't want to work anymore has to do more with one's lack of drive and lack of a work ethic. he wanted to be a rich bigshot but didn't want to put in the effort required to achieve that on his own.
I don't agree with what you say about adoption. The same can happen within bio families,and it does,probably more so than adoptees,so that's a fallacy as far as I'm concerned. Children are a product of their upbringing,adopted or not,a stable background being paramount in both cases.
Adoption has NEVER been an issue with me insofar as having known adoptees, who are no different.
There has been NO insecurity problems with those that I've known,neither had they made a BIG issue out of being adopted.
However,there's nothing like how You want them to be when if fits your agenda.