why dont the pigs like the pet raven moses, stories about sugascandy mountian

Organized religion presents a threat to any autocratic power. Moses told stories about "Sugarcandy Mountain, where it was Sunday seven days a week, clover was in season all year round, and lump sugar and linseed cake grew on the hedges". This offers a utopia that is different from what Napoleon and the pigs are trying to convince the animals of. Napoleon wants the animals to believe that he is the only one that can offer them contentment.