Although I don't know if you realize it -- but there is more truth to your statement than you may think. Most of today's Jews can trace their lineage to the Khazar kingdom of the Steppes of Eastern Europe. Think Huns and Mongols. They converted to Judaism in the 7th & 8th centuries A.D. They converted to Judaism en masse and are not related to the biblical tribe of Judah.
Read "The Thirteenth Tribe" by the Jewish author, Arthur Koestler.
Probably. Unlike the Sephardic and Persian Jews, but I don't think it makes a difference. If someone says they are a Jew IMO they are.
Ancient Egyptians weren’t Arabs, you moron! Arabs invaded Egypt in the Middle Ages, 7th century CE. LOL!
What's wrong with you? Hagar was Egyptian but Keturah was Arab and she had six sons with Abraham. They are all semites just like the Jews.