A friend told us about this song.

And I was amused, but also saddened. I think God already did this and yet, “we would not” listen.

The figure was used in the Scriptures to express the stubborn, untractable spirit of a people not responsive to the guiding of their God (Exodus 32:9; 33:3; Deuteronomy 9:6; 2 Chronicles 36:13; Jeremiah 17:23, etc.). 

https://www.biblestudytools.com/dictionary/stiff-necked/