There is definitely a selfish element to some people my sort of age (i'm 28). Most of my mates that went to Uni strangely have a weird attitude where they think they are better than everyone.
I was brought up to be polite, hold doors open, offer to help carry things etc
However... I find that often, either in shops, on the road etc it is actually the older generation that are pure ignorant, whether it's a 70+ ramming a trolley at you rather than saying excuse me, being cut up in a car park by someone who probably shouldn't be driving and then flicking the v's at you and even my Grandparents whinging about 'hoodies' as they have read about them in the paper, there are a lot of ignorant people in the world, not just the younger generation.