If this ex Pakistan army officer says that Pak army fight for religion (implication every one not muslim is their enemy) then this is an open confession that after partition (INDIA - PAK) all Hindus (in PAK) were forcibly converted to Muslims or murdered (some of them may have moved to other countries). If you start pulling up religious issues from history then there can be no world. Hindus have been targeted Kashmir. Kashmir was a Hindu region and as Hindus religion does not teach to be a fanatic. They (Hindus) have been killed, forcibly converted and the Hindu region has been captured.
Fighting for mother land and religion are totally different. They both (patriotism and religion) have totally different passion, love, faith and belief.
What kind of religion it is that teaches that every one that do not follow it is an enemy and to fight till either the follower dies or the non follower is killed!!!! is this Islam???? then oh world wake up.
If religion is base for an deciding an enemy then for sure there is no existence of human race.