Considerng the modern history of Judaism, if I were Jewish, I’d sing in a minor key too.
It’s actually a different “mode” than the natural or the harmonic minor. Even the HAPPY songs (like “Hava Nagila” (Let us Rejoice!) are written in this mode. AND it starts on the “5 Chord” LOL.
There are Jewish Scales, Hungarian Scales, Gypsy Scales, the Seven Greek Modes, and MORE! I love to play them on my Electric Guitar! LOL!
But I hear you, my FRiend. The Suffering of the Jewish people through the centuries really does inspire a “Minor Mode”.