I don't understand why some Pakistanis like bilal and Ninja are so insecure about Urdu and its origins.
Talk to any linguist and you will know that the Indo-Iranian tree that begins with Vedi Sanskrit and Prakrit opens to different branches including Avestan, Farsi as well as Hindvi, Marathi, Gujrathi, Punjabi and other branches.
http://en.wikipedia.org/wiki/Indo-Iranian_languages
The script does not define the langauge. The script is just a skin. Turkish used to be written in Arabic script, now it is written in roman script. So did the Turkish langauge change from "Muslim" Origin to "Christian" origin?
A language is always in continous change, it has to borrow words to grow. That is why half of the English vocabulary is made of words that originate in French, Latin, Arabic, Hindi and so on.
In linguistics, a language is defined by its grammatical construct and sentece structure, not just by its vocabulary. And in that Hindi and Urdu are identical.
Even Farsi comes from the same ancestral language as other Indo-Aryan langauges so obvioulsy they have shared words as well. If you go back further, Latin and Sanskrit have similar word structures as well.
The idea of using Persian script was to allow migrants, traders, soldiers, sufis who came to the plains in India to speak the local language. If you go to Kerala for example, you will find out that the early Arab traders and settlers on the coast started using Malayalam in Arabic script. They used a few loan words from Arabic as well ofcourse, but although the script was in Arabic, the language itself and its composition was Malayalam. You can't just say that because the script is arabic, therefore the langauge is Arabic. Arabs would be unable to understand what is written in that script.
Similarly, talk to a Persian in Urdu or give him a prose in Urdu and he will be unable to understand except a few words here and there. And try the same with a Hindi speaker and he will understand almost everything except for a few words here and there.
The main centres of Urdu historically have been Delhi, Lucknow and Hyderabad. Infact, Hyderabad for 300 years starting in the 15th centruy was a centre of Urdu consolidation. The poets of Rampur from different religions contributed greatly to Urdu literature.
Punjab was not seperate from Delhi,there were no sharp Indo-Pak borders before 1947 and cenrtainly many great Urdu poets are from Punjab like Allama Iqbal. Amir Khsrau widely regarded as one of the early prominent poet of Urdu by many wrote in both Persian and what he called then Hindavi was born and brought up in UP.
For some people who are so touchy about the closeness of Hindi/Urdu, please stop being so apologetic and defensive about it. And stop fawning our Persian as if that is the only language that is your "true idently" andhaving an identity crisis. Farsi is a great language and I have nothing against it.
But Urdu in itself is a language to be proud of. A language which alongwith its brother Hindi is pretty much the lingua franca of South Asia from Bengal to Balochistan. Be proud of that.