The story needs some consistency first..

It's not clear as to whether the author has gripes about the Delhi Airport System in general, or specific to how they treat Nepalese passengers, or both! It seems more inclined towards the latter, as the author mentions his past experience at the Indo-Nepal border, and the conclusive sentences indicate a bigger picture of India's (and the Indians') discrimination toward us.

However, following statement sort of contradicts that impression:

"One American lady was laughing at the banner scrawled with “World’s #1 Airport”. “Kathmandu Airport though very small is far efficient than this one” she said."

(She should 've had a delightful experience -- why sarcasm!)

Regardless of what the author's intent was, here are some of my observations based on my personal experience transiting through Delhi airport 4 times in the last 3 years:

1. Whether it's an airport or any public facility, systems in India don't align with the systems that we're used to. Things need to be taken with a grain of salt, at times! (I hate the smell there, more than their treatment, really).

2. The treatment that we typically get from others is a reflection of our own attitude. (I'd ask everyone to ponder into this before deriving a conclusion!). This is generally the case everywhere, and very much so when it comes to Delhi airport matter.    

3. We, in many cases load ourselves with a sense of prejudice when we approach India/Indians/Indian systems. Need to get that thing out of our head, at least in the context of 'transiting flights through India'. A Frenchman, at the airport, shared with me a story of how he got ripped off at Delhi airport on his way to Thimpu (via KTM). I proudly carried around my green Nepali passport and didn't have to pay a penny to any of those crooks a single time. A fellow Nepali passenger must have thought  I frequently travel, and asked me the same question (laid out in a vague statement -- type) thrice:

"Yo airport ma Indian le Nepali lai dherai dukha dinchha re hai?"

I was indifferent each time he asked (told?) me that question.

Really, it depends on how you view it! You could very well run into some jackass that tries to degrade us and our dignity. But that doesn't mean you'd generalize everything and everyone based on that encounter. Can't that happen anywhere else?

4. Regardless of the terminal's improvement, the transit area must have been designed and operated with 'solitary confinement' in mind! It's ridiculously compact and uncomfortable. You can walk outside the area and tour around, but there's nothing entertaining -- they hardly divert your attention.. Unfortunately, that's where the passengers end up spending most of their transit hours. (Have a book handy to kill those threadbare hours..)

5. If you dislike something, and you know it's wrong, then you should yell. Yelling works, given that it's aimed at the right person, and you back yourself with the right argument(s). If you can't yell, then maybe gracefully avoid that airport. (Might think twice about KTM airport too, in that case).

In summary, to *not*  have an atrocious experience at the (Delhi) airport, we should refrain ourselves from being too critical, and put away the premonition that we get mistreated based on our passport and/or the nationality.

I wouldn't blame the author for getting irate as a result of the lost baggage, though..
We don't know if that really fits in the big picture of 'discrimination' however!!

~@~