I think it is due to pride......thats why they become angry if people come into their 'space'.......I once had a bad encounter: I was working at Science Park at the time, and one of our Bangladeshi cleaners wanted me to take a pic of him next to someone elses car.....so he stood next to the car, and lay his hands on top of the car while I took a snap. Then comes the owner of the car, angryly, saying he could scratch his car, and demanded to see our ID's! How low can people come? Is it discrimination? Was he just plain concerned about the car?.......you tell me.....