[nopardons]

Actually,I think that there was some "cultural mixing" during the Ice Age,but not as far afield as Africa to China.

Yes,the Caucasoid classification of Australian aborigines is a head scratcher,but it is what it is.:-)

[gentlestrength]

It's not accurate to say "many biblical scholars say...."

They don't. There are fringe groups which teach weird things. The best thing is to take whatever your group is teaching you, and do as the Apostle Paul called "noble": compare everything taught you daily with what is actually in the Word (Acts 17:4). Also, study objectively what the historic positions of Christianity are on the foundational beliefs. Then compare those to what your group is teaching you, or the books you're reading. Ask the Lord to give you wisdom, and be open to truth.