Also, do note that the Bhagavad Gita is also Krishna urging Arjuna to fight and kill his cousins. I have respect for Hinduism and think that it deserves the same level of respect in Christian countries as it accords to Christianity in India, also that Hindus are Christians allies in the war against Islam, BUT, I do note that there are serious differences, which mean that while we can respect each other, we must respectfully disagree on a lot.
Who were, don't forget, evil, and the war necessitated to the adherence to a strict code which included amongst other things, prohibition from attacking non-combatants, and cession of fighting after sundown.
This is far less morally repulsive than the mandated slaughter of innocent children in 1 Samuel 15:3, IMHO.
This was the case that was discussed in the following drama: