The best way to make the natives seethe is to be proud of your heritage clothing.

Desis, that means dhoti/veshti with undershirts and stand collar/Nehru shirts - or at least kurta-pyjama
Chinese people, that means Hanfu, tangzhuang, qipao.
Black people, that means EMBRACING your traditional fabrics and beautiful designs.
Arabs in Europe, ditch the tracksuit and start with keffiyeh + abaya or whatever is native to your region of MENA.
Latinos, you guys have a variety of rich indigenous clothing traditions.

Together, we can make Timmy mald one ethnic outfit at a time