If people are dug into an ideology, talking won't make a difference, especially if they've been conditioned to believe the opposition lies and nothing more.
If it came to peace or war, I'd rather choose war every time.
Because the opposition is just that, the opposition. They don't have to be shooting at you to fight you. They can and will sabotage your economy, mess with your politics, spy on your military, fund a propaganda machine that will find something wrong with your nation and sway the public opinion to hate you, even in peace your enemy is still your enemy.
Sometimes, the opposition is ignorant, and ignorance doesn't listen to reason or logic, and because logic does not apply to real life, the opposition will never be stable.
I don't agree with world peace, because world peace sounds a bit corrupt to me. Everyone would have to live by specific rules, there'd be no individuality, everyone would be the same, think the same, it would be terrible.
Disagreements are natural, war is necessary.
I have absolutely no problem with war over peace, because war gets things done while peace prolongs the inevitable anyways.
While you have a good heart and want to spare lives, your enemy may be taking the time to build up for war and exploit your good faith.