Heck, if I extend it further, do I have the right to return to Africa (the home of ALL of us)? Why should I have that right?

Why shouldn't you have that right?

If you are willing to live in peace, not be a bigot or a racist jerk like the Boers?

DeGaulle is right. Habitable land is all 'spoken for.' Going forward humans either get along or they stay divided by appearance and/or religion/ and or greed combined with overtones of race/religion/bigotry/arrogance/classissim.

I streamed a movie last night - 'The Last Face' is a 2016 American film directed by Sean Penn starring Charlize Theron and Javier Bardem. They portray 'doctors without borders' struggling to save lives in field hospitals during a conflict between 2 African regions- chaotic violence as militias assault mortar UN refugee camps, marauding drugged up child armies attack refugees fleeing from camp to camp. The portrayal of meaningless hopeless violence was so extremely graphic my wife left the room.

The human condition sucks. The new twist: a migrant trillionaire controls the means of running drone wars over all the land no matter who, as DeGaulle observed, 'speaks' for that land. This trillionaire is protected by the global super-power that is experiencing it's own dilemma; crime/homelessness/migration/poverty/infighting between races/religions.

If I move to Austria or Portugal, is it possible I could become a target of anti-Americanism; the new class of unwanted migrant?

I know my finger-pointing at population doesn't seem to have any traction, but that's okay. I'll be dead within a few decades and it'll be what it'll be as the hordes battle each other "Under the Banners of Heaven."