可以和他说 Thank you for correcting their inconsiderate behaviour! I am also from China, and I clean my table at MacDonald every time. Don’t stereotype all the people of one country, especially if it has billions people. Are you sure all Indians are well behaved? Then, why are there so many rape crimes, and people even shitting on the street?
如果他说他是新加坡人 可以再说 Are you sure all Singaporeans are always well behaved?