It seems that some Sikhs are not reading up on their history. And that's a shame as this particular history is only around 80 years old.
In 1944, H S Mailk also produced a map of Panjab and outlined it as a Sikh country, to the British. Muslims were asking for Pakistan, so why couldn't the Sikhs have their own country as well. Seems a fair argument.
But the map Malik produced and presented to the British would have only showed a Sikh population of some 20%. The British asked him on what grounds would you claim this as a "Sikh" country? Both the other communities could outvote your community individually. Malik had no answer.