Who exterminated "degenerated art"?

Degenerate art was a term adopted in the 1920s by the Nazi Party in Germany to describe modern art. During the dictatorship of Adolf Hitler, German modernist art was removed from state owned museums and banned in Nazi Germany on the grounds that such art was an "insult to German feeling", un-German, Jewish, or Communist in nature. Those identified as degenerate artists were subjected to sanctions being forbidden to exhibit or to sell their art.