He has no ideology beyond a raving id and whatever momentary advantage he thinks he can seize.

I do think he has some ideology; it doesn't have to be conscious or coherent to structure his decisions. I genuinely think he believes that women are objects, sexual and ornamental—everything in his remarks and behavior bears it out—and while he may have found it convenient to build his campaign on white insularity and xenophobia, I don't think he just adopted it as a stance out of the air, either. He's a rich white man in America and nobody ever disabused him of the belief that those attributes entitled him to fuck whoever he felt like and kick the shit out of the rest. I agree with the raving id, the gratification of the momentary advantage, and the conviction that truth is meaningless when it comes to him. Reality is what he says it is. If it contradicts him, it's because reality is wrong. I think he really would have imploded and faded from view if people hadn't given him the power of their attention. Unfortunately, the media covered him like a real candidate and the Republicans broke the spine of their party for him and now here we are.