Proud on not being an Indian anymore?

Over few years, I have seen many people on Facebook posting their joyfulness on receiving foreign citizenship...American, Canadian, Australian... Yeeeee, I am American!! And so much celebrations and people congratulating them? On what? Of leaving the country you were born to? Of calling a new country your homeland, your motherland?
Well I am old school in my thoughts on this, if thats what you say. I really think of this as BrainDrain. Isn't it so? You reach that stage and are educated because of the country you were born to. Aren't you suppose to serve your nation?
I wish to ask these people...You went to a new country for better opportunities, but don't you feel like a traitor when you get some other country's citizenship? Or do you feel as sad on not being an Indian anymore, as you are happy on being an American?
And why this sense of achievement? What have you achieved? No country is bigger/ better than the other. They are in different states of development. By this means being born in Australia should be an achievement for a new born?
In India, you keep calling yourself South Indian, even if you have always lived in North India.  But you are very eager to leave your origins behind when you get an American citizenship!!
And another achievement for you all people is getting a foreign degree! So this country does not recognize your Graduation, so you Graduate again? I mean, really? I would love to study in a foreign university provided they recognize my education degrees and teach me something new. And that university be something like Oxford. What's the pride in getting the same degrees from a regular foreign university? You all are agreeing that what you learnt was useless? Well  Great!
I don't mean to hurt my friends and all other people, but I hope you will understand when I may not join others in congratulating you all new citizens.