I was back in the USA recently. I flew to Buffalo for a conference. I arrived in Chicago O'Hare International Airport, and sure enough, the moment I stepped out of the plane, it felt like a market. A meat market, metaphorically, so to speak.
See, I don't understand why there is the need for airport staff to shout at everyone. Do they think that incoming passengers are dumb and need to be shouted at? Sure, immigration procedures can be confusing, not to mention a new environment. But does that merit you, the airport staff, to just treat incoming passengers like cattle to be auctioned, while directing them to which line they should queue up? It really doesn't make a good first impression.
See, not everyone is a first-time international traveler and visitor to the United States. I for example already has been to 36 countries. If I link all of my flights together, I could circumnavigate the earth more than 9 times, and it can already reach the moon. I have seen plenty of different new and unfamiliar things and places, so I know how to deal with them. I don't need to be shouted at.
And no, even if it were my first time to enter the USA, or even if it was my first time to enter a foreign country, I still don't need to be shouted at. Shouting just scares people, and unnecessarily stresses them. I can keep my cool, even if I got selected for random secondary screening, I don't get stressed and still act with dignity. But not everyone is like that, and I honestly don't see the point of airport staff just shouting at everyone repeating which line they need to queue up in, since there are signs all over the place saying where they should go.
Yeah, it is so different from European airports, I should say. The immigration process in airports such as Zurich, Munich, or Vienna are more smooth and human-like compared to the USA. It doesn't make a good first impression, you know.