disrespect at work places

in was told by a friend of mine about a job opportunity  with Tusker supermarket Uganda so  i decided to give it a try and see what they had to offer, i went there and meet the human resource manager who was so arrogant as he first told me am Kenyan and they don't employe Kenyans yet he was also Kenyan,so i had to explain myself and my application was accepted and was told to come for interview and conditioned to come along with my birth certificate to prove my origin,  and i did accept but didn't take it with me,so when i went for interview it was time to suffer as i was refused to go in do interview with the first people yet i was to go in with them so i had to go in with the second lot, but after the interview we were insulted that we were fools and we couldn't use our brains to do a simple interview,
so human resource guys if you ain't to offer work to people don't insult them