How so? Please refute me, and what does this have to do with history?
Firstly to answer your question you need to understand what Punjab is. Punjabi is not a ethnicity it is a linguistic identity which has come into existence recently and most strongly after partition in some parts of Pakistani Punjab after provincial nationalism and with sikhs in India. No one homogeneous ethnicity lives in Punjab. Minawali area is mostly Pashtun tribes which now speak Seraiki and Hindko. South Punjab has many Baloch tribes and Potohar ethnicities are different than ethnicity that live in around lahore etc. and no single region by itself is composed of a single ethnicity. As a result you will see alot of different faces and accents in these areas. You can not define how a punjabi looks because there is no single look.
Punjab (a comparatively modern name given to this region) is the opening of Indus-Gangetic plain(the most fertile in the world) to the resource poor central asia and pathway to the throne in Delhi and therefore this region has seen massive immigration and conquests throughout history(the reason for multitude of ethnicity). The Punjabi culture you are talking about firstly is not the culture of whole of the area that is today called Punjab. Bhangra, basant (and the associated kite flying is mostly done in eastern Punjab, Delhi area and Lahore area) is not the culture of Punjab but the culture of the majha region of Punjab and regions to it's east due to Sikh populations. So don't try to impose your majhi Punjabi chauvinism on the Seraiki, Pothwari, hindko and other regions of modern day Punjab.
Secondly, if you think that Nusrat Fateh ali khan etc., classical music, qawali, musical instruments which are common all over Northern subcontinent are of a Punjabi tradition then you are wrong. They are all mostly the product of Indo-Islamic civilization and not some hyped up Punjabism. Also, most of the elaborate meat dishes from Paye to pualo are the creation of indo-Islamic civilization and were mostly historically limited lahore. Even the ones which are localized foods are hard to distinguish from nearby regions because they belong to the same indus-gangetic food traditions and geographical realities.
Thirdly, you mention that what is known as 'Indian culture' world over is Punjabi culture. Don't know what you mean by that and if you think a few artists singing in Punjabi in UK (which is due to large immigration from Punjab region to UK) then you are wrong again. Open your eyes ans see what people in the west consider 'Indian culture' and try to figure out it's origins.
Ignorant people like you are the curse of Pakistan and are adamant on not making Pakistan the country for which muslims of subcontinent struggled for decades i.e. Quaid e azam's Pakistan but are intent on making it the Pakistan Maulana Abul Kalam azad predicted it to be
