Disclaimer, this isn't true for everyone, but as somebody raised southern baptist, I think this image is missing the point.
The biggest risk for Christian parents having their kid go to a drag show is they might end up questioning Christianity, and rejecting it.
They're not wrong about that risk, just about the morality of it. They want to have their kid indoctrinated, but only into the things that believe. They see anything that takes their child away from Christianity as evil.
Its gay slang; bussy = boy pussy