It's not hard to see what agenda their parents have encouraged the girls to promote in their music.
The images on their shirts are not product logos or popular teen idols. They are images of a man who was responsible for more death, destruction and worldwide chaos and misery than anyone else in the history of the HUMAN race.
To praise and encourage Prussian Blue is a crime against ALL humanity.
Note: "prussian blue" is a reference to the gas Zyklon-B used by the Nazis to kill millions of people during World War 2.