The Original design of Pakistan proposed by Pakistan Muslim League never contained Bengal as part of Pakistan.
In the Famous muslim leangue Annual address of 1940 it was proposed
" The province of Punjab, Sind, NWFP and Balochistan will form Pakistan"
Sind , Punab , NWFP and Balochistan are Geographically linked…sharing million of years of history culture and traditions …we have relations both blood and trade, people intermarried…businesses shared..we depend on each other so…
Quaid-e-Azam and Iqbal made us one country based on " Religion, Cultural resemblance, traditions and geographical bonding"
Now,
**What Pakistan is not : **“dont mistake Pakistan with religious union …caz if it was only a religious alliance than…it would have included Saudia, Iran, Afghanistan etc etc…being a muslim doesnt make u one country”
There are other important considerations as mentioned above.
Bengal was a conspiracy of the British…istead of giving us Kashmir and muslim majority areas of Punjab they gave us…a far fetched land good for nothing Bangladesh"
Two headed babies never suvive…and the formation of independant bengal was inevitable.
Two biggest Mistakes we Pakistanies made were:
1. Including bengal in Pakistan
2. Opening borders for Refugees from India in 1948.