There’s no way to dress in clothes from American retail outlets and NOT be easily identifiable as an American.
You could of course dash into the nearest haberdashery to your arrival airport and have them hook you up with the latest native fashions, but even that charade will only last until you open your mouth.
Well, things will turn.
Are you embarrassed to be ID’d as from America, the greatest and freest nation in the world?
I’m not.
The contempt of the world is basically envy. Same reason they crucified our Lord.