How do you know he is "Colonel Fasih Ahmed " ? Masquerading as Muslim officers is a standard propaganda technique in the Indian electronic media.
There was however a secular era in BOTH Pakistan and India when officers joined their armed forces irrespective of religion.
Pakistan had Parsi and Christian officers, and today in addition to Parsis and Christians has Sikh officers in the Navy and Army, There is least one Hindu pilot in the Pakistani Air Force.
From the mid 1950s to the early 1980s Indian Muslims joined the Indian Armed forces as officers, mostly in the Air Force and Navy. Indian Muslims joined the Indian Army mostly in the technical cadre and medical corps. The Indian Defence Ministry directives do not permit recruitment of Muslims in the combat regiments at the private (jawan), NCO level. The technical non-combat wings such as Electrical Mechanical Engineers may have some lower level Muslim technicians. The legacy "Muslim" regiments inherited from the Pre-Independence Royal Indian Army like the J&K Light Infantry, The Deccan Lancers, have been purged of Muslim soldiers. Even the composite secular 10th Guards no longer have Muslim soldiers, The secular era in India is over.