Lennon supported Reagan in 1980. He couldn't stand Carter.
And you know that had to drive Yoko nuts. And remember John had an affair a few years earlier.
As Dennis Leary put it..."What kind of country is this where John Lennon gets six bullets in the chest, and Yoko is standing right next to him and not one effing bullet? Explain THAT to me!"
Lennon grew up and changed his mind on a lot of things later in his life.