National language
The refugees that travelled across the border spoke Urdu and had cultural and social traditions different from that of their counterparts the Sindhis adopted. With the adoption of Urdu as a National language, it was apparent that the Muhajirs were in the forefront of the struggle for Pakistani nationalism whilst their Sindhi, Punjabi and Pathan counterparts supported their own regional identities and found nationalism a fad excuse by the Muhajirs to gather more power out of the system.