Because he’s part of the never-Trump group. There were about 22 from NRO who vowed not to vote for him and implored their readers to do the same. Therefore, he wants Hillary to win.
I realize he was a NTer.
Thomas sowell wrote in that issue, too. I still respect Sowell immensely. In fact, TS wrote a column earlier this month acknowledging Trump has a point regarding the relationship between black voters and Republicans: http://jewishworldreview.com/cols/sowell081916.php3
My point: not everything someone says is right or wrong. In this case, on this issue, the author is making a lot of sense.
He blatantly attacks Hitlery in the article, while merely taking a swipe at Trump.