No, I don't think so. Because even in war, where the goal is to eradicate or subdue your enemy, there are still rules of engagement. There are rules, sometimes unspoken that guide war and that's why in some movies, when one side does some stuff, the other will call them dishonourable.
Same goes for love. Some say love is war, others say it's a paradise. Zayn Malik thinks it's both😁😁😁😁
But I think it's not everything that's done in the name of love that is acceptable and as such not all is fair in love. So after all the chit chat I say no. All is not fair in love and war