Generally, David Rohl's research is nothing to be lightly dismissed about, and any refutation would require very serious information at an immense magnitude which I don't think it would ever really happen since he gets too many things make too much sense. It's best to just give up on trying to think the bible has strict literal value before the events of Abraham. I don't think it makes any sense to claim that Aryans were Hebrews or anything utterly insane like that.