Image Analysis

In this image the visible objects are a bunch of dead and white people, an alive and standing white guy, a fence, a tough floor, walls. The man is reflectionating. 

What I can infer from this image is a summary of the holocaust, the artist wanted to explain that lot of people died and somes did not. But the ones that did not feel exactly the same as the ones that did.

Another inference I made, is that the standing man is remembering how he abused in his glory times, and now he has lost it all as consequence.

My main question is what does the standing man is thinking.