Most probably they were going to Europe no one knows about the so called "greener pasture" that is Iran in Pakistan, probably some Afghan immigrants that is another case.
All these Afghan Sikh/Punjabi jokes etc are actually baggage of Sikh(Punjabi)-Afghan wars Pashtuns/Punjabis of Pure land have emerged out of it and soon the others will.
This is from Purana that is contemporary of Mahabharta that(mahabharata) my estimate is again from Gupte period with lot of fabrications(un documented things in geography).
different Pashtuns tribes have different origins, even if some of them were there they would have followed "Sindhu religion" just like Kalash people.:P btw bharat is relatively very recent term with more political than cultural meaninings
bro one thing can you clarify is that why you separate Indus regions west of Indus completely from East of Indus Indus regions; Punjab, Sindh. I agree in your traditional Bharat terms(relatively very recent) that originated from Gupte period? areas including west of Indus were not relevant but...
That current Hindu concept/Hindu nationalism etc is a 19th century product; Hindu religious elite of that time carried a lot of baggage from foreign Islamic invasion, they confused Nationalism, Religion,Culture, DNA, geographical boundaries into a single concept of Hindutva to form united...
never seen any food spot here in Pak(probably there is one in Karachi) will love to try South Indian food one day,common Pakistanis generally know very little about South India.
cant understand your one point, A country that needs to sustain 1.3 billion population in a cramped geography and obviously wants to take it to some good standard of living(cramped in a sense that traditional land/energy connection with resource rich regions are through other countries Pak...
what identity Pakistan is the only country where its native ethnicties(Sindhus) peak in population anywhere in the world; Sindhis, Punjabis, balochis Pashtuns, Chitralis, Gilgitis etc, they are native people of Sindhu land and identify with it.