What is the point of imposing modern beliefs and concepts on a medieval play?

The usual tack here is to identify the witches as marginalised female figures, pushed to become the sinkholes of a failing society, and inhabiting the fringes of human ecology (swamps, marshes, the uninhabitable but ecologically invaluable); and then to detect homologous characteristics in Lady Macbeth's behaviour, turning her murderous ambition into a case of demonic possession at the behest of an abused natural world. I find such reworkings of the play strained, verging on the bizarre.

This sounds like a really interesting topic!

I am working on a project with ecofeminism, can I ask what theorists or sources you used?