I really don't care who put what together (but lot of material are at our disposal NOW) and everyone is supposed to be attracted by what suites his state of mind or understanding I guess. That's why I can understand that the bible can be repulsive on some matters if you focus on details.
The OT is just showing mehow life is when we have to live by laws (like kids who just don't know what is right and wrong) ... AND need to follow too much humans and laws (who can contradict themselves BTW) which leads to piramidal systems = and injustice) It's all like the one who is above or already got more, have more rights (even to sin)
The WTBS likes to use OT a lot and I guess that I know why!
To me the Gospel is talking about growing up ... we don't need laws, we only need to take care (not missing the point = what is really important in everything - Charity including forgiveness for everyone and trying to forget about our Ego).