>Jewish Encyclopedia 1925 Volume 5 page 41
>"Edom is modern jewry"
don't find this exact sentence grammar, believe this is inferred, postulated, or summary
https://www.startpage.com/do/dsearch?query=Jewish+Encyclopedia+1925+Volume+5+page+41&cat=web&pl=ext-ff&language=english&extVersion=1.3.0
https://www.jewishencyclopedia.com/search?utf8=%E2%9C%93&keywords=v5+p41&commit=search
https://upload.wikimedia.org/wikipedia/commons/e/e3/Jewish_Encyclopedia_Volume_5.pdf
http://esau.today/esau-is-edom/ /picrel/CAP
discussion of but no sauce:
https://alt.religion.christian.romman-catholic.narkive.com/yrnvu3q0/the-jewish-encyclopedia-1925-edition-vol-5-page-41-states-edom