Yes but an evolved/mythical identity has roots in myth and mystery. Therefore, its development cannot be chronologically reconstructed and traced to its beginning. As such it has no beginning and has sort of an immortal or eternal existence in the minds of its upholders.
As example, take the Baluch identity! No one knows who was the first Baluchi, the first ancestor and which stages transformed Baluchi Culture to its present form and gave Baluchis a sense of uniqueness, group-feelings, and n…ational identity.
Mythical identity exists at the level of subconscious and instincts and is part of one’s spirity, soul, and even biological being (e.g. color, facial features, height, etc.).
A created/historical identity on the other hand has a traceable beginning in time. Its development can be chronologicaly re-constructed and various stages of its formation can be identified and described. Therefore, historical identity only exists at conscious level. Example is Pakistani identity. Every body, even a child, knows that on August 13, 1947 all people were Hindustanis. The next morning when they woke up, they had suddenly become Pakistanis.
Mythical identity is very profound and hard to be given up abruptly. Historical Identity on the other hand can be as abruptly given up as suddenly it has been acquired. Territorial and religious identities are historical in nature and are highly fragile in this sense. For example if a Baluchi changes his citizenship and religion, he would cease to be Pakistani and Muslim suddenly but will still be a Baluchi practicing Baluch Culture, speaking Baluchi language, and upholding Baluchi values. Race and blood are also very important drivers in human self-definition.
The problem with Pakistani identity is that it is only historical and has its mythical dimension missing. As such it is very fragile. And probably that is why Pakistan4Ever is trying to construct its mythical dimension.
As for the role of group-feelings in being productive, nations with strong sense of identity have always made history and have survived for longer. Only nations with profound sense of distinctiveness and identity and so strong character have survived and accomplished great deads. Strong sense of identity provides motive energy to nations to survive and r…ationale to gaurd their n…ational integrity.
As for Islam, it can never be a basis of identity. It is a stupidity and non-sense to base identity on religion especially when it is a prozeltyzing religion. Also the boundaries of Pakistan are arbitrarily drawn that don’t coincide with cultural frontiers. To develop this new identity, more ancient and profound identities would have to be demolished which is extremely difficult. Urdu can also not give Pakistan an identity because in reality it is the same language as Hindi but written in a different script.