nickels, you are a novice to this subject. austronesians are mongoloids. thai people, lao people, malay people are not black man! poly's are just a hybrid but their language they speak and their other malay half are mongoloid also.
the melanesians , negritos are not austronesian bro! those people are classified as "austoloids" and that is a whole different thing. perhaps you are confusing these two? austoloids are the negrito looking people like melanesians and papua new genuians.
do some reading before talking.every human being once originated in africa but that does not mean that we are the same as africans because we are different in physical and genetic appearance.
so what if the bushmans somewhat have eyes like asians, some asians have skin like whites or noses like them. whats the issue? we are all human and will have similar features right? like i said the austoloids who are black looking are much closer to asian than to africans genetically. you claim them as relatives but they dont consider to be the same.