Scott Adams is not wrong, but I am surprised that people learn from reading his blog because non of Trump's tactics are new. To give Adams credit, he is a great blogger. Adams lures readers with "Let me share Trump's secrets with you because only us smart people know what is happening." People love to feel smart and be part of an exclusive group so they quote Adams' simple analysis as amazing insight. Also Adams fails to acknowledge that Trump overtly appeals to misogyny, racism, and xenophobia. Trump wouldn't be this popular without scapegoats.
On a personal level, I feel depressed that a candidate will get more votes, not fewer, after making blatantly sexist comments.
[1] Clinton during his candidacy: https://youtu.be/ckHfgqK_hcU?t=10m30s Notice the difference between Bill and Hilary near the end.