You are lumping people together based upon superficial similarities INSTEAD of by their actual genetic relatedness.
You classification system is meaningless if you want to lump people together who are no more similar than the people you would separate.
If you will actually look at those differences, you will see that Indians, Europeans, and Japanese and Mongolian are all more similar to eachother (Caucasian and Mongoloid supposedly) than any of them are to a Philipino (another supposed Mongoloid).
Where would you put New Guinean people into your neat three boxes that are not actually based upon anything real?
And how did we GET three different races or forty two different races? Any number of different races?
What was the mechanism?
I’ve yet to see a Mongolian Norwegian.