If they truly interpret Holy Quran with the wisdom and Intuition, they will find that Holy Quran is not teaching anything different than Holy Bhagavad Geetha. The fighting that is told in Geetha and the Quran, both are indicating the fight one has to carry against the bad, evil, selfishness etc qualities within oneself, and not to kill others externally. once a person is victorious and gain complete control over ones own body, mind, will power, including the breathing, then, the person truly finds self free from the bondages of the nature and then finds GOD truly. All other interpretations of the Holy books are adulterated interpretations and are modified by the preachers of selfish motives. If you are truly dearer to GOD, why on the earth you end up carrying a weapon in your hands? Can't the omnipotent and omnipresent and all knowing GOD protect you? The reason why you take weapon in your hands is because, you are brainwashed and also you donot truly believe in GOD or ALLAH and hence donot have trust in GOD or ALLAH. Hence you take weapon against others. Look at Mahatma Gandhi. His life tells a lot about the value of having belief in GOD by way of self experience of WHAT IS GOD, rather than believing GOD by a mere reading of books or listening to preachers speeches.