Trump has the distinct advantage of having his base voters rally around him, nurture him, encourage his divisive and disruptive behavior no matter how ridiculously idiotic he becomes. So I think it's safe to assume that they're just like him in so many ways, that they see themselves in him as their most powerful means to project their hatred, their bigotry and their isolationist view of the world. I'm thinking it's for these reasons that many of his supporters are able to tolerate and actually endorse his wholly un-presidential behavior. Trump as president is unlike any other before him in that all of that difference, ALL of which differentiates himself from the others is horrifically damaging to the nation, and many of his followers see that as his most admirable strength, his (THEIR) personal weapons of mass destruction.
They relish the controversy he foments. They luxuriate in the upheaval and unrest he creates in order to extend his (THEIR) influence, his (THEIR) control over a nation divided by his (THEIR) willingness to weaken and threaten it's security and it's ability to influence the world in a positive way.
This travel ban of Trump's is nothing more than his pandering to that base, his way of keeping them under his influence, his attempt at strengthening and expanding that base of his. This symbiotic relationship between him and many of his supporters is about as destructive as they come and it seems they all like it that way.
Small wonder they admire Trump's fondness for his counterpart in Russia. Both they and Putin (via Trump) want to burn America to the ground and have it rebuilt in their image, for they see it as their one and only way to effect the changes they desire.
Gotta hand it to Trump though, his grab for ultimate power and influence knows no bounds and he's found a way to make it happen. He's even made a deal with the devil to get there but hey, it's all about him anyway, so what does it matter that he takes the whole nation down with him to placate his own desires? He gets what he wants, when he wants it any way he can. He's screwed the whole nation to get his way, but now that he's got it, it looks like he didn't think he could in the first place and now he doesn't know how to work it right or even how to get himself out of it.