What is Benjamin' s opinion of the windmill and how does Squealer try to undermine Snowball in Animal Farm?

Old Benjamin had very little to say about the windmill
being built on Animal Farm. He "refused to grow enthusiastic," but his only remarks were
"cryptic" ones about the long lives of donkeys.

Squealer,
meanwhile, was making sure that Snowball would never be ever to return to Animal Farm.
Squealer claimed that Snowball "had sold himself" to the rival farms, who were now
plotting to overthrow the animals with an attack on the farm. Snowball had always been
in league with Jones, Squealer said, and had been serving as the owner's secret agent.
Documents had been discovered to prove Snowball's deceit, Squealer
claimed.