The hint in this case is "God bless you"

That's actually the abuse showing through. It's intentional passive aggression and a manipulative speech pattern. It's meant to imply, "God bless you, even though you're breaking his rules and making him sad and probably going to hell".

And before you ask, I was raised evangelical, was deeply involved in ministry, went to bible school, and even worked at a church for a few years; I know how these people think because I was one until I saw the light and ditched their religion. The number of times I've seen "I'll pray for you/them", "God bless you/them", and such used as insults is too damn high.