paravariations

The song isn't about hating religion or being against it.
Opiate is about the people who try to shove their religion down everyone's throats.
And I agree with Pushit_Salival who said that the song was about whatever you wanted it to be.
Adam said something like that in an interview with JJJ Australian radio.
The meanings of the songs can be about whatever you want them to be, as long as the meanings you find are positive.