Even as a U.S. citizen, every time I've traveled to other countries in the past few years, it's always jarring going from the hospitable, friendly customs people in the other countries, to the literally rude awakening of getting practically accosted by the agents in the U.S. upon returning.
Try Russia or Germany - neither country has border officials that could be described as "hospitable" or "friendly." They make US border guards look like teddy bears.
I cannot speak for Russia, but Germany cultivates a fundamental mentality of liberalism and respect, for any kind. It will be very difficult to find someone in Germany that wears a badge who has less than 13 years of school education or acts unreasonably, disrespectful or doesn't play by the rules.
I didn't say they weren't respectful. I said they cannot be described as hospitable or friendly, which is true. German border guards are very professional and respectful -- they follow the rules exactly -- but they're not friendly. They're rather cold.
I've come into the US many times, and personally witnessed thousands of people being granted entry into the US with nothing but professionalism. Cases such as this are certainly rare.
There will always be a few people in any large group who treat others badly, and US border guards are no exception. I'm sure we could find rare similar cases in Germany or anywhere else, too.
