As everyone else is speculating, allow me to put my monocle on and join the crowd.
1. This Sikh is a recent immigrant to the UK from Punjab with not very much education, hence working at Sainsbury supermarket as a labourer not as a manager.
2. All his relatives have been in the UK for a very long time. Perhaps many of them are born there.
3. He does not feel the Punjab he left among his Punjabi mates.
4. These Punjabis are not the ones in his village or town as he imagined them to be.
5. Many of his relatives may not have turbans anymore except for the special occasions.
6. They may have urged him to take it off and become mona in order to find a job.
7. The turban is all he has got left for him to keep his inner identity intact.
8. He has been ostracised by his closed ones not long after his arrival with these kinds of nudging.
9. After the incidence, either it is like," We told you so" or as Harry ji said, get the maximum out of the system as it happened at his work which is a big company.
10. He was coached to talk like that through others as he is too" embarrassed" to say it by himself. Hence, not even his name is mentioned which is a well thought ploy.
11. With some lump sum settlement, he also hopes to become the bird of a feather that he thought he already was after leaving India.
I hope I am wrong in all the above because my monocle is dirty and cloudy.
Tejwant Singh