If that was the case, what was the need to kill Ravana and Kamsa or for Arjuna to get into a war with Kauravas. Of course, wars are illusions; and Ravana and Kamsa were none other than Brahman. We have to play our part (nimitta) in the game (leela).
Exactly, those events simply were what was happening then, Krishna did not prefer peace to war, Arjuna felt bad though, he showed his ignorance - although to review Indian history, it seems most agreed with him.
There is much focus on controlling attachments on the spiritual paths, but equally important is aversion. Trying to get away from what is this moment is as bad as not being able to let it go, for both are fueled by an ego which is trying to control reality. Another direction of ego is towards indifference, many arrive at this too after an understanding of nonduality, but still it is a closed approach to now.
Compassion, a love for all that is encountered, arises naturally from seeing all is indivisible from you, life becomes a constant 'yes'. Each of the three directions, and indeed the nature of ego itself, is a type of 'no'.
The key to religion, love, and indeed this thread in a way is: accept.
One of my favorite teachers prefer to say admit because of its twofold meaning: allow in, and tell the truth about it. Since it is already here, on some level it has already been accepted by what you are. Any 'no' then simply creates an illusion that this isn't your doing already, it becomes impossible to fight reality because you would merely be in disagreement with yourself. Seeing this, gradually reality starts to help you, starts working with you, because you stop fighting it.
Life becomes the true individual, each moment is indivisible from us. So many fight with what they are, but it is impossible, it is just a thought happening in what we always have been.