In terms of the Chinese Head Tax, probably not right (don't know enough to fully comment), but how is that different from current extreme vetting of refugees and migrants from the Middle East??? This time its a security issue, whereas at that time it was probably more of a "do they have enough money to support themselves", which is arguably reasonable in a country that couldn't grow much food back then.  What about the now Entrepreneurial Class Immigrant that has to invest hundreds of thousands of dollars and create jobs to stay.  Isn't that worse???
The author states that "Racism is part of human nature and will always be with us" and that may be true in the sense that humans always fear and distrust those that are different from themselves.  But, is that fear itself racism, or how one responds the real issue??? True faith can help as exemplified by Jesus who loved the outcasts of society.  Love is the calling of True Christians.  Choosing others before me.  That is what made NA good.