She's seeming like a brat. Not out of character for a 14 year old girl, nor is wanting to be famous without consideration of anything other than the glamour but all the public disrespect is very unbecoming.
She's still a teenager, so obviously she has a lot to learn, but this was pretty rude. It's possible she just favorited the tweet and didn't mean anything by it; I hope she doesn't actually think Janet is jealous
It doesnt matter if MJ would have supported or not, it's her life.
Most of our parents didnt support a lot of things that we wanted to do when we were young, does that mean we wouldnt have done it if they were dead? She needs to do what she wants, it's a movie role not drugs or anything that will harm her.