Does discrimination arising from stereotypes exist in Sinagapore?

In the second article, it is stated that ‘a belief that the backward-ballcapped guy slumped in the back row of class are going to have attitude problems’. This shows that professors may discriminate and judge their students based on their appearance, perhaps, it may also mean that one’s abilities may be judged solely by their appearances. Is this fair?
From my point of view, I definitely feel that this is not fair but I am aware that this problem is affecting my country too. It is a sad fact that Singaporeans judge people by their appearances. Referencing from an online article by Singaporean Kelvin Tan, http://www.geocities.com/kelvintan73/articles/racism.htm, it is stated that ‘If you visit Bugis station on Sundays, you will see that many Indians spend their day off in the popular haunt, Serangoon Road. There would be some mobile railings segregating them from the rest of us, and the way the MRT staff shout at them or the expression in their faces, I was surprised to see that they were smiling at us now.’ This shows that Singaporeans, especially Chinese, discriminate against those of another skin colour, condemning them to be unfit to be near us. I feel this is embarrassing. I thought we were a multiracial society where all races were thought to live harmoniously with one another? After this stunning revelation by Mr Kelvin, I think we can all conclude that Singapore still has a long way to go before all races can live together harmoniously.
Worst still, racial discrimination is not the only form of discrimination in Singapore; there are still ageism and elitism present in Singapore. The old, despite their wealth of experience are finding it more and more difficult to hold on to their jobs or find another one. Also, there is a growing number of teenagers who think too highly of themselves, one example will be overly-outspoken RJC student Wee Shumin. These do not bode well for the future of Singapore. Imagine a country whose citizens avoid the aged like the plague and ostracized those they think are weaker than them?? It is a recipe for self-destruction!