I think it's a little more complicated that some of the previous comments suggest. I think this song is about how people who claim to be pure and godly have, in many cases, become the opposite of that. They've become the oppressors and the sinners, refusing to see their own sin while condemning others. Ozzy is calling out a challenge, saying that if Jesus is real and plans to return, he might want to go about making it happen because his followers are turning his religion into a mockery.
I think it's a little more complicated that some of the previous comments suggest. I think this song is about how people who claim to be pure and godly have, in many cases, become the opposite of that. They've become the oppressors and the sinners, refusing to see their own sin while condemning others. Ozzy is calling out a challenge, saying that if Jesus is real and plans to return, he might want to go about making it happen because his followers are turning his religion into a mockery.