I really need Sam to stop telling Dean how to react and feel and cope.
Like, I really need him to back off.
SAME
Sam has absolutely no right to be telling Dean how to feel. Dean is the one who remembered Mary. Dean is the one who had to deal with losing her. Dean is the one grieved her. Yes, Sam grieved Mary too. But not in the same way Dean did. Sam never knew Mary. For Sam, Mary was always an abstract. Something that existed only in photos and little anecdotes John and Dean told him. Sam grieved the idea of Mary, not her as a person.
But Dean did. Or, at least, he thought he did. Dean had a narrative, a concept of Mary that he carried around with him for three decades. Three fucking decades. A concept that probably helped Dean get through Chuck only knows what.
That narrative and concept has been proven false. Those memories have been proven false. The mother Dean thought he knew, is dead even though she herself is alive.
Sam needs to recognize that, for all intents and purposes, Dean is grieving their mother again. It’s something that Sam can’t understand and he’s not going to understand it, but it’s something he has to accept and deal with.