What does the Sergeant-Major think of the monkey’s paw?

The Sergeant-Major believes the monkey's paw is cursed and should be destroyed.

“It had a spell put on it by an old fakir,” said the Sergeant-Major, “a very holy man. He wanted to show that fate ruled people’s lives, and that those who tried to change it would be sorry. He put a spell on it so that three different men could each have three wishes from it.”
The way he told the story showed that he truly believed it

“Better let it burn,” said the soldier sadly, but in a way that let them know he believed it to be true.