[jfengel]

He's acting like this because he campaigned on "government bad". Not any specific bit of it: all of it.

It is often theorized that he's doing this on behalf of some foreign power. That seems unlikely, and more to the point, uninformative. He was democratically elected: a plurality of voters wanted this outcome. He still has wide support among them.

It is true that foreign powers have been spreading propaganda in his favor, and the result is a weakening of the country. But that's not the result of one person betraying the nation. It's the result of American beliefs about what their nation is and should be.