Ok, so apparantly I opened a much bigger can of worms than I realized! I have looked through the other threads and links posted here, and have honestly tried to understand where the people who claim it is heretical are coming from, but I still can’t.

I see that if you assume that certain lines mean or imply such and such a thing, then it would be heretical. But I do not see the lyrics themselves,
as such, as heretical. If they were it would be impossible to understand it in a way that was theologically sound. And the way that I understand it, I assure you, it is free from heresy. I am hesitant to try to explain why I don’t see it as heretical because of looking over the controversy so far it seems unlikely that anyone is going to change their minds about it, and I’d rather not get into a pointless debate at present. The one thing I will say though is that since it is not
in and of itself heretical, there is nothing to stop it being imported into the Catholic Church and embraced as Her own. The fact that some people interpret it in a way that is heretical does not make it heretical in and of itself.