Immigration processes millions of people each day. There are going to be mistakes.
This sounds like they got a false positive, investigated, and released him. That's how the process is supposed to work. Making this into some massive anti-American rant says more about the author than America. This experience sounds unpleasant, but like it was handled professionally.
I've spent an hour being searched by customs. I don't know why - perhaps because I was returning from India and hadn't shaved in a month. It was inconvenient, but also the job of customs. This did not bother me.
I fly domestically and internationally at least 20 times a year. I get caught up briefly in all sorts of different ways all over the world. It's part of travel, and it's really not that bad. This is how nations protect their borders and enforce their laws, because not everyone is a saint like you.
All you idiots saying you won't work in or travel to the US because of the TSA searches - give me a break. EVERY country in the world I have ever been to has nearly identical search procedures as the TSA and most countries have stringent immigration checks. Many asking far more probing questions than American immigration, including Netherlands, Israel, and Britain. I was nearly denied entry to Britain because I didn't know the address of a friend who I was staying with.
Sorry, I'm tired of all this false outrage about minor f-ups with the TSA and DHS. These organizations have some major policy and procedural problems, but a few hours one time while immigration officials do their job of making sure you don't have false documents is not among them. If you don't like it, go somewhere else where a $20 bribe instead of an objective investigation gets you admitted - which is most countries in the world.