Don't put the blanket statement out there. In the case of China, they can be very nationalistic, but you only need to look on their weibo network to see how dissatisfied they are with the state of affairs inside China, whether on infrastructure safety, government corruption, wealth disparity, etc. edit: I mean to say here that nationalism does not necessitate blindness or irrationality.
That being said, India is taking some especially big kicks to the groin right now. What with the starving people due to inability to distribute an abundance of food, the massive power outages that have gained global attention, and disappointing economic performance compared to the other BRIC countries, maybe your Indian friends are more defensive right now precisely because they're hurting so much?