I completely disagree with all of that. To judge art in a void removed from its creative context is simply ignorant.
I think the only thing that's disagreeable is saying that morality doesn't have a place in art. I think it does.
But he's right about how no change in moral perception will ever change one's initial response to a work of art. He's right, too, in suggesting that if one is strictly and simply discussing the content of a work of art, creative context is really pretty irrelevant.
That's partially why, when I presented the images in my first post, I included no information on the artists or the method in which they created the artwork (although I did, in my 'thesis query,' weigh the scales, so to speak).