Well, some people shun national identity because they can clearly see their nation falling apart. I am proud to be a citizen of the United States, now this does not mean that I'm always proud of the decisions our government makes. Slowly but surely, the entire, "We the people" concept is beginning to fade. Various nations are eating themselves alive from the inside out, and it's mostly because there is no identity for citizens to uphold in the first place.
It's sad, yet correct. One can no longer "lose themselves" in the glory of their country. Here's what I'm finding out more and more each day: If I rely on my country for my identity, I'm going to be disappointed. I'll also disappoint others. Nations crumble. They always have, and they always will. Nowadays, with "the people" getting excluded more and more, it's almost a ridiculous thought to even speak about, "national identity".