why is my elderly grandfather trying to turn the entire familt against each other?

Question

My grandfather is always trying to tell me i am his favourite,saying not to ever talk to my sisters,and saying they said this/that,and not to talk or bother giving presents to my grandmother(his wife)constantly,but just ignore the comments.lately he has started doing the same to my sister,and that she is now better than me,and says that i should be like her,and is constantly degrading me and constantly putting me down and saying i dont know anything and i should be like mysister.why is he constantly trying to cause trouble between family?

Answer 1

because he is old and he can