Why dont we greet eachother?

The other day when I got into the lift at my office I noticed a few Dutch people
among the passengers and I got thinking. I have been to The Netherlands before
and I am aware of how these people greet anyone who gets in or gets out of a lift.
A person, even a stranger, getting into the lift is greeted with a Dui(an equivalent
of Hi) and is greeted again with Dui when he leaves. And I was thinking what
these people must be thinking of us who get in and get out of the lift almost
scorning eachother.
There is no eye contact, no smile for godforbid what if the other person asks
for an earth shattering favor or the other person of the other sex may think
that I am making an advance.
The latter is true most of the time in the Indian context. In Indian, I can't think
of the fairer sex person to respond with a Hi! to a stranger male though this might
not be true vice versa, but which might not happen unless the male is hrithik
and the female is the so called 'liberated' woman.

Once, while travelling to some place in Europe, I had this Indian Dude sitting
beside me and I thought let me introduce myself and we can have a little chit-chat
on the way. Mind you this was not even a lady. And I was greeted with a
oh-not-another-jerk kinda look with no introduction in return! I thought what's
wrong with this guy. These are the people who put a bad name to indians. And
possibly putting off people who want to be polite to others.

Maybe the readers can throw some light on why Indians dont greet eachother like the
way westerners do.

Good day!