Make the mistake of entering Israel with a passport stamped for an Arab country and you will probably put the US second :) Perfectly civil.. but a LOT of questions, over and over and over.
Back in 1990 I lost my passport in Turkey, got a temporary one at the US Consulate there, and then got it extended in Munich (where I was living at the time). As part of this they crossed out the 90-day expiration date, and wrote in "see page 16" by hand, where the consular stamp etc. appeared. A month later I had a business trip to Israel for a business trip and decided to continue on to Cairo for vacation. They questioned me for about an hour at Ben Gurion as I left the country ... and who could blame them?
We landed in Israel and I realised I had handed over the wrong passport (as we work in the region a lot we all have a 2nd passport for Israel, it is just sensible), cue face to palm moment.
They "detained" me for about 45 minutes, but I have heard of people taking longer (and, in fairness, shorter).
That's quite possible. I admit that the 20 or so countries I've visited isn't enough to say for sure that the US border controls are the worst, just the worst I've experienced so far. :)
