I wonder if you are the real Tathagata who was rooting for Indian pride few days ago on this forum. If you are just one of the many fakers, I am sure you are smartly fooling the world but then, nobody knows about your existence. Grow a backbone.
Anyways, as far as your's and Dhawan's comments are concerned, you are right. Indian or for that matter, any international student would take some time in getting used to of the new culture. Some people, under the shame or inhibition, start to live in closed groups without making an attempt to learn. But obviously that is not a reason and should not be a reason for such killings.