OP the taller white humanoid beings could be considered our "owners". They genetically engineered containers for souls here on Earth, namely, the human body. These containers hold the purpose of housing the souls in order for us to mature until we are able to join them. The Greys are basically living robot types. They were made as keepers of the containers. They have no ill will towards us and are not beings from another planet. They simply have a job to do, and they do it. They do not care about the advancement of our souls, there job is simply to maintain the containers.