Getting to the point of macbeth

In Macbeth, the main idea has to do with how predictions come with desires and desires don't come alone they come with bad thing  ,losing trust ,killing the ones that you've know for long. I say thing because in this play the witches said a prediction that caused lots of death ,Macbeth had the desire to be king so he killed a great king that has been around with him for a long time ,he just didn't do that but he blamed innocents ,he had guilt but he let desire take over him then desire broke all the trust around him and to be king he knew that everyone that knew the prediction had to be gone he killed his right handed the guy who knew everything about this prediction .not only this this but he made sure that their wont be no one close to serve as a king so he eliminated kids and the mother just to be the only king.