This line is so familiar to all of us, but never really thought of it how far it is "TRUE "!!..
According to the source, Everything isn't fair, but in war, you act as if you can do what you need to to survive because if you don't behave that way, you'll be killed. In love, when a man is competing for a woman with other men, the prize is so great, that the rules of fairness are dispensed with. It's not like you can justify this, except to say that when your own person good is concerned, you'll do anything.
The world's biggest lie is everything is fair in love and war
And if that's true,then the one who behead soldiers at the border are legitimate and so are lovers who throw acid on girls..
No further explanation is needed.Above dialogue is enough to explain.