It is never explained as the point of the story is how Christmas is more than just presents. As the audience is children it is assumed that they will just get the message and not ask awkward questions (which they always do). You could make a prequel which explains it if you have enough time on your hands to ask questions like this*.
*Don't point out I must have enough free time to answer questions like this.
Really dood the grench u know the grench who STOLE Christmas
GRENCH
Jim Carrey's, The Grinch Who Stole Christmas was released in 2000. Though, Boris Karloff's 1966 Film was a classic.
Jim Carey
Surinam.
No.
Noise, noise, noise at Christmas time!The singing
scrooge or the grinch
Tom from Eddsworld hates Christmas because he is a Jehovah's Witness.
indian and people hate christmas but only sometimes
because he was always picked on
Because he is desperately lonely, and Christmas is generally about being together with loved ones (of which he has none)