It was never written as a Christian song. Not even a Jewish song. It’s a song written by Leonard Cohen. I think many people decided that because the chorus was “Hallelujah” that it must be Christian, but it never was.
Too right! I agree.
Here is a video where a guy is explaining the meaning. First time I have actually seen the words. Interesting.
“What Does “Hallelujah” REALLY Mean? | Lyrics Explained”
https://www.youtube.com/watch?v=LU4-QxCDNs0