Hardly. I don't endorse anything suggested in the song. But I am not bent out of shape by merely being asked to imagine them. What are you so afraid of?
Yes, I am agnostic. I do not believe in organized religion so its not too much of a stretch for me to imagine a religion-free world. But thats as far as it goes. I do not expect anyone to see things as I do nor do I care a fig if people want to worship whatever god they choose (or none) as long as they harm no one and don't try to shove it down my throat.
(Before I get flamed too much here, I should add that the athiest @ssholes who are out there doing things like trying to have the word "god" removed from our PoA or make sure that no one reads the 10 commandments in a public place make me sick.)