Airlines do care. They get assessed a fee for every passenger that is turned around.

Oh look, Australia cares: https://immi.homeaffairs.gov.au/form-listing/forms/1563.pdf

> Have you, or any other person included in your visa application, ever been removed, deported or excluded from any country (including Australia)?

Oh look, Germany cares: https://preview.auswaertiges-amt.de/blueprint/servlet/resour...

> Have you ever been expelled or deported from the Federal Republic of Germany, had an application for a residence permit rejected, or been refused entry into the Federal Republic of Germany?

Almost like you're just making shit up based on some anti-US sentiment.

LOL at your hypocrisy. I am a UK citizen, and I am an Australian citizen, and I am -not- a US citizen, lived and worked in both and in Europe though I am, currently, in the US. But sure, make the same assumptions that you want to think I'm guilty of making.