“Just remember, if you come back to the Shack talking like these people, 

you’re dead to me.”

Who talked like that? All the time?

McGucket.

Fiddleford Hadron McGucket, the man who “took his brother away”, and got him involved in something dangerous.

Fiddleford Hadron McGucket, who was involved in something so horrific, he wiped all his memory away, and thus couldn’t help Stan with anything to get his twin brother back.

Fiddleford Hadron Mcgucket, who to Stan, symbolizes what distanced him and his brother, what disappeared his brother and the battle he’s been fighting completely alone for the last 30 years. 

dead to me