The mistaken interpretation of "Hallelujah" has taken hold and is now part of the song's legacy. It will continue to be performed for purposes not originally intended, and some people will shake their heads at it. That's the new reality.
It may not help that the last appropriate use of the song was probably in that weird
Watchmen love scene, and the general public laughed at it.
I want to say that a country artist changed that line to "And there's religion too," but I could be mis-remembering. There is this:
Cee Lo Green criticised for changing lyrics to John Lennon's Imagine
A Perfect Circle sticks to Lennon's lyrics but makes them sound bleaker:
Notes:
1. I chose not to post the band's intended video of news clips because it's too graphic and political.
2. When the lead singer (Maynard James Keenan, who you may know from Tool, but not
1930s economic theory) sings "Imagine all the people" it sounds like he's bemoaning overpopulation, which I'm not sure Lennon was going for.