How was Napoleon able to remove Snowball as a threat to him?

After the meeting, Squealer explains the new arrangement to the other animals. Just as in the case of the milk and apples, Squealer claims that taking on leadership responsibilities is a burden for Napoleon and his committee; they do it only for the general welfare. If left to make their own decisions, he explains, the animals might make a wrong decision. He also calls Snowball a criminal; even if he was brave in the Battle of the Cowshed (an idea that Squealer also questions), “loyalty and obedience are more important.” Snowball is remooved because he does not follow Napoleon and causes stress to their great leader.