Asserting that "The CBP goons want U.S. citizens to answer their questions as a ritualistic bow to their power" is douchebaggery in it's highest form, and it illustrates his mindset as that of man vs government. That statement alone, referring to decent people just trying to do their job as goons, qualifies the author as a douchebag.
Also, how much power does a guy on a low-level government wage really feel they have? I'd bet anything they're told in their training that what they do is extremely important, that they are on the front lines in the war on terror. And they're also told that when someone refuses to cooperate (which, by the way, no terrorist would do) there's pretty much nothing they can do about it. They have what they feel is responsibility without power, which is a terrible situation for them to be in.
I certainly don't know or care if those questions are mandated by Congress. (I don't find it hard to believe that they were though, or at least mandated by a group set up by Congress for that purpose.) It doesn't really matter.
What I'm sure of is that they weren't mandated by the any of the people who questioned our author, especially if there are check boxes for them in some software. They probably weren't mandated by anyone who had ever met any of the author's victims, or even heard of them. And the people who mandated them will most likely never even hear of this guy or the handful of nutjobs like him.