Apparently traveling in a lot of countries is grounds for suspicion in the US. Well if you have multiple citizenship you can always just choose which passport you're going to use so how useful is that really?
These stories get everybody riled up but in reality are a tiny fraction of people who enter. I have a story too - when I was visiting Amsterdam I had the most rough body search I have experienced when traveling. Maybe I should never visit there again to see all if the rich culture and friendly people? That'll show 'em! My wife was called into the back room on our way to Aspen because her bag triggered some false alarm. Cross that place off my list, I'm never going skiing there again!