Some people in bordering countries (esp. Pakistan) have a mis-belief that “Indian Muslims favor Pakistan more than they favor India”. “Some terrorists believe that the Indian Muslims are on their side”, Some even believe that most Indian Muslims will fight for Pakistan in case of a war between India and Pakistan.
The gesture was not to show rest of India that they are patriotic, rather it was to tell the enemies of the nation that DO NOT TAKE US FOR GRANTED. WE ARE INDIANS and THAT IF YOU LOOK AT OUR COUNTRY WITH BAD INTENTIONS THEN WE WILL TAKE OUR YOUR EYE BALLS (and play gotian).
The Indians already knew of the patriotism of all Indians, the effort was to convey this to the other nations that they do not get into a misadventure and eventually hurt themselves.