He came to his senses some years after he wrote "Imagine," an anthem of utopianism:
From this source, indicating that John Lennon moved to the Right side of the political spectrum:
John Lennon was a closet Republican, who felt a little embarrassed by his former radicalism, at the time of his death - according to the tragic Beatles star's last personal assistant.In other words, John Lennon grew up. He accepted reality.
"...He did express support for Reagan...
"...He had moved away from his earlier radicalism...."