“This seems to speak more on adaptation rather than evolution. The two terms get confused.”
Well, you sure are confused. Maybe if you had even bothered to read the article you would know that this was a comparative study of genes, not behavior.
I did read the article and it spoke on adaptation relative to climate. It made the statement that lighter skin color was an evolutionary process rather than an adaptive process. Evolution denotes more complex. Skin color changes and the acceptance of natural milk are adaptive processes not evolutionary. Take your attitude and drop it off with someone who deserves it, not on a someone who makes an innocuous and non threatening statement on an internet forum.