Asian players are very eager to work hard, but they don't have the physicality of the Europeans, so they might actually need to work twice as hard. With street football, their skills will improve a lot, and so will their tactical awareness, because by playing within a limited space, you need to be very focused on your game.
When someone makes a racist remark, that doesn't make him a racist, but you have to say, 'This the line. You've crossed it, and you have to apologize' - not only to the person who has been hurt but also the people who live with that racial abuse almost all their lives. I think that's unacceptable if you don't.