Holocaust Art: "It Takes But One" by Elizabeth Denholm and Alyssa Dziurlaj

What visual techniques are employed in this painting? It shows to me that because the Jewish people are on the red side and there is a huge side it shows that the Jews are trying to make us remember what happened back then as it is so obvious in the picture. Also the darkness is seeping into the Jews and that they might be losing hope. Also it may show that the help and sympathy from one German can give hope and change the life of a Jew and the people in the background and this shows that they are all black and white and all part of the same group, they don't stop to help, stop to feel sympathy.
How do these visual techniques highlight major thematic elements of holocaust art and literature?

Child innocence, humanity, brutality of the Nazi's, fragility of human life, illusion, irony, juxtaposition.