To counter your argument, most people don't know what an atheist is, probably even dear old Johnny
Lennon really fit the profile of being an atheist.
Remember, he wasn't ever too keen on labels.
But that's because that's all they are...labels. They're unimportant.
And, even if Lennon wasn't an atheist (but he definitely wasn't part of any organized religion either) he definitely wrote about atheist themes...such as in Imagine, God, etc.
There's not much I can honestly reply to that !:

A man says he is not an atheist. Perhaps I'm just a sucker, but I conclude he is not, coz he says he isn't.
I pointed out earlier in this thread that the lyrics of 'Imagine' were a-theistic. Bear in mind though that that song and 'God' and others of that ilk were written in 1970/71 and his mind changed about alot of things over the years, like the rest of us. And it's simply a documented fact that many, many artists in that 1966-1974ish period wrote from quite a few different perspectives, covering and exploring many themes - often contradictory ones. If you look at Black Sabbath's 1971 "Master of reality" Lp, they cover marijuana, faith in Christ, nuclear destruction, the devil, lonliness, universal hippie brotherhood {this from a band that said they hated hippies}. That kind of scope wasn't unusual in them times.
Labels need to be diffrentiated from meanings of words. If you do not believe God exists, there is a word that describes you. That word is 'athiest'. Nothing to do with a label. If you play guitar, you are a 'guitarist'. Nothing to do with a label. And so on. Mind you, labels are actually quite important. How they are used is where we need to be careful, not whether they are used.
"
Most people don't know what an atheist is, probably even dear old Johnny". How can any of us know what
most people do or don't know ?
Hmmmm......I used to be an atheist. I decided back in 1977 at the age of 14 that there was no God. I was
very definite about that for years. I knew what an atheist was then, at 14. It's kind of stretching the bounds of believability to conclude that a well read, much travelled, world weary, longsearching, heavilly debating guy like Lennon wouldn't know, two or three weeks before his 40th birthday, not only what an atheist was, but whether or not he was one. He simply could not fit the profile of one because he did not fit the description of one. It's a bit like saying you fit the profile of a gay man even though you are not gay. There is a massive gulf there.
To bring the conversation back to the theme of the thread, I think that the songs we write are an extension of ourselves because they come from us. It stands to reason that if art is about expression, then whatever is in us is bound to come out at some point. Loads of songs have been written by atheists that are not anti God. It's not a matter of being anti, it's just seeing the world from a perspective where one doesn't believe God
is.