Sometimes, symbolic BS is necessary to avoid controversies. At least, a student who has a scheduled language as his / her mother tongue, can use the language as medium of instruction in India. Using a language as medium of instruction lead to survival of language by producing literature. I have come across translation of Marathi, Malyalam, Punjabi books (published in India) in English / Urdu and they are producing really good literature highlighting problems their relevant areas. At least, these minority language speakers in India does not have to face racist remarks like ‘you hate national language, because you are insisting on your less developed language against the sophisticated national language’.
So India acknowledged languages spoken by 91% population and Pakistan rejected right for more than half population at the very beginning. Some people still try to justify these actions by referring to political and economic suppression (which is also a dominant factor), but when its about suppression of expression (which directly relates to language), they go aaen baen shaen. If you simply ask such people ‘was the decision of only one language inspite of agitation by Bengalis right one?’. You will never get a simple ‘Yes’ / ‘No’ answer even today.
This is how languages develop by adapting other languages and Urdu also got words for all the languages of Pakistan.
What are the organisations which are working for promotion of languages in India? I know about NCPUL.
The book was written (not one book but many. These were few examples). That means there exists a faction, which consider that Punjabi has been ignored. The point is simple as that. Generalization exist every where. If Sindhis can be termed as xenophobic for loving their language and culture, then coming a book from Punjabi writer terming Urdu as man-eating language can also lead to any generalisation for Punjabi mindset. If you ask me, I personally hate such generalizations as these are mere expression of insecurities by people who come up with such generalisation. Otherwise, if you love your language and own your culture, you are bound to respect others as well.