Originally Posted by GUWonder

US DHS and other government employees at airports in real or pseudo-uniforms of law enforcement organizations are indeed more likely to yell and be rude to airline passengers than what seems to be the situation in many/most other countries. That said, the notion of Americans being more rude and unfriendly than people in many/most countries really doesn't hold up to be true unless limiting the comparison to the border control and airport security screener types.