Millions "disappeared" not because of opposing viewpoints, but because this forum is so slow-moving. I'm used to faster, like Amazon, which unfortunately has retired.
Interesting book, "The Rest Is Noise", which is a history of 20th century music. In it, the author discusses how the tin-pan alley songwriters, most of whom were Jewish, (Gershwin, Cahn, Jerome Kern, etc.) liked jazz, and how these songs became what we now see as "jazz standards" (All The Things You Are, Sweet Georgia Brown, Summertime, I Got Rhythm, etc.).
So a major factor in jazz's transforming and continuing assimilation into American Western Culture was the adoption of these tin-pan alley harmonic progressions, which gave us the ubiquitous ii-V7-I progression, the I-vi-ii-V7 and all the other variants; and most of this was due to a Jewish influence. They were 'outsiders' who could relate to black music, and wanted to assimilate.
Still, the very earliest jazz, like early Louis Armstrong, was horn-driven (not piano-driven) and was more basically blues in nature, not harmonically advanced or Westernized yet.