Today I came across a song translated from German, and the description says it was sung by German girls addressed to their Führer. 

It concerns Hitler's ‘pure race’ concept, or Herrenvolk (master race) theory.

It was a pseudo-scientific ideology that designated Germanic peoples as the superior Aryan race, destined for dominance. It advocated a hierarchy rooted in blood purity, viewing Jews as an anti-race and a menace to survival. 

This ideology ultimately contributed to the Holocaust and the mass extermination of groups considered inferior.

How the concept is being ingrained in innocent girls, read here - 

 We are the door that leads to the future. 
 We are the tree on which fruit ripens, 
 That which inspires us, that which is holy to us, 
 Is planted once again, strong and pure, 
 No one can take it from our soul. 

 
 We carry in our hearts the light 
 You spread to your people, 
 We want to be its loyal guardians, 
 Passing it on pure, unchanged, 
 Through our bodies into new life.