Why do the executions take place in animal farm?

the animals had said that they had been in contact and been working with snowball the pig that had said to by Napoleon to have been the betrayer and actually had said to have been actually been working with Mr. Jones the original owner of animal farm. in truth napoleon had probably talked or made others talk with the animals who had been executed. they Behind the Scenes were probably been tortured and abused. the reason they had been in contact with snowball it could be because they had just gone completely crazy maybe they were forced to without knowing the consequences. The author makes you think in this book.