BS”D
Those words meant little to their composer – some say that it was a metaphor for some political event in what became Italy but chances are that Giuseppe Verdi, despite the fact that his name in Heimish would be Yossi Green, just knew of those words from studying what to him was the “Old Testament”.
Let My People Go is not kodesh either, and the same goes for Turn Turn Turn which is a translation of Koheles. This is simply dragging kodesh into places where we don’e belong – OK and then some for a ben Noiach but NOT FOR US!
Boruch Hamavdil ben koidesh lechol!!!