Interesting Conversation

Today let me share with you excerpts of a conversation that I witnessed. Before sharing the details let me provide you a brief background. We are housed in the GMP village (fully furnished twin sharing apartments) but are required to come down to the MDP Dining Hall for having breakfast / lunch etc. During the mornings there's always a rush since classes are from 8:30 AM.
Today was no different with everyone rushing through their breakfast to reach the class on time. After finishing his breakfast IR was patiently waiting outside the washroom for the 2 people inside to come out. The time was 8:25 AM. After a good two minutes one person emerged from inside the washroom. IR stepped back to make room for the person. Suddenly VK aka visionary emerged from nowhere & tried to wriggle through between them. Now, IR had witnessed such behaviour of VK several times earlier in the past. This time he was determined to teach VK a lesson or two. So he pulled VK by his arm and stopped the latter. Here's the rest of conversation.

IR: Hey, where do you think you are going? Get in the queue.
VK: Oh Oh...sorry I didn't see you.
IR: Why? Are you myopic?
VK: He He, Yes, No, I mean...
Then IR goes inside & shortly afterwards VK joins him. (BTW, there are just 2 basins).
IR: You know what, guess you should learn a bit of courtesy. That sure will take you a long way in life.
VK: He He. In India we do not need courtesy.
IR: Who told you?
VK: Indians are by nature not courteous.
IR: hmm, that's the latest bullshit that you engineered, right. On 2nd thoughts, you are right. Apparently some Indians aren't.
VK: Of course, you are a very courteous Indian.
IR: You bet I am and you are one extremely discourteous Indian.
VK: Oh Oh. I was just joking.
IR: Maybe, but I wasn't...

The reason why I am posting this conversation is to highlight that even in a B-school where apparently one comes across some of the most elite people of the country this type of unacceptable behaviour is extremely commonplace. The same people when they travel overseas though are magically transformed to extremely well-mannered & thoughtful individuals. My question is then why do we not exhibit such nice behaviour towards others while we expect others to show the same towards us. Food for thought :-)