Please explain how this answers the question about the various human races being on the Arc or not. Is this saying that non-Jewish races were included but they are not clean?
Not at all. I wasn’t even focused on the racial aspect of your question, just clarifying a miss conception many have that only 2 of each animal was taken onto the ark. jews were not even identified at this time. Abram aka Abraham was the first “Hebrew”. the term “Jew”, from what I understand can from Judah - one of the sons of Israel - likely from Judea which was what the southern kingdom was called fater the civil war. Jew became a collective term for all Israelites - most of which lived in Jedean are after the Assyrians swept away most of the northern kingdom around 650 BC. BTW there are no lost tribes - all twelve tribes were and are represented in the Judean area since many from the northern tribes migrated to the south during the apostacy started by Jeroboem (spelling).