1) My reaction too. When Michael Anton was named to the NSC, I reported on an array of anti-Muslim and anti-diversity comments he had made over the years. My story got a lot of attention and feedback from readers, but virtually none from political reporters in DC.
2) About Islam, he wrote on an obscure bulletin board (styleforum.net) that "“I look at the world and I see a whole movement of people who want to kill me, destroy my country, and end my civilization." 
3) Here's a screenshot of the comment he posted.
4) On diversity, his comments were also unusual, to say the least.
5) He didn't hide his preference for homogenous (i.e. single race) societies.
6) The lack of diversity noted by @MazMHussain greatly accounts for the D.C. media's soft treatment of Anton. Another factor -- fear of biting the hand that feeds you. Anton was the NSC media chief; journalists didn't want to upset him. Kudos to @jbouie for calling out the NYT.
7) I wrote two pieces about Anton in 2017. First was about his creation of the intellectual source code for Trumpism -- theintercept.com/2017/02/12/dar… Second was about his extremist ideas on diversity, race and nuclear war. theintercept.com/2017/02/16/tru…
