RE: Lennon said “It’s just a bloody song”.
In other words, Lennon is telling us not to take the words seriously... Unfortunately, too many people have made it the anthem for their cause.
Totally agree, Neil Young and that Ci Lowe or whatever it is both sang "Imagine" and took out the atheistic sounding rubbish, "and no religion too", Neil Young even took that out and that video is over at youtube.
There are many discussions on Lennon, some say towards the end of his life, he might have bucked the atheistic sounding stuff and may have acknowledged a spiritual force. Does he have a song actually called "God"? Maybe, I know he has a song where he does seem to ask God for help. I can find it I am sure.