Scott Adams has a number of opinions that some parts of the internet find unreasonable. I have read a number of his blogs and he makes good and bad points, just like everyone else.

Here's one of his "controversial" posts: http://blog.dilbert.com/post/133406477506/global-gender-war

What made that controversial?

Some reactions of that specific post:

Dilbert creator claims there's a "global gender war" and he'd become a suicide bomber if he couldn't get laid

Scott Adams: We live in a matriarchy because men have to get permission for sex

Dilbert author goes on crazy rant about Middle Easterns and women.

Scott Adams is also the dude who is only prevented from going on a murder spree by a regular hugging schedule. (This one is a direct quote from a HN user.)

Scott Adams: without access to sex, men can become killers

Those observations are inconvenient, I'm not sure they're controversial.