How does squealer try to undermine snowball?

Squealer undermines Snowball by spreading Propaganda that portrays him as a traitor and a dangerous figure. He claims that Snowball is secretly collaborating with humans and has been sabotaging the farm's efforts. By manipulating the other animals' fears and using persuasive language, Squealer shifts blame for any problems on the farm to Snowball, effectively discrediting him and consolidating power for Napoleon. This strategic misinformation helps to maintain control and prevent dissent among the animals.