Bottom line, why have there been european pilots senior to me at every aviation job I have ever had, but essentially no US pilots in europe (exception is ryanair I think)?

This is not a discussion about asia or the middle east, I do not want to live or work in either region. I would live in europe if I could get a job at one of the better carriers, but that is apparently not an option for me.

Greencard holders should not be able to hold pilot jobs in the US if there are citizens furloughed. Of course, if you like this country enough to take a citizenship oath, then welcome aboard, this debate no longer applies to you.