May god forgive u all for answering a baby's question like this to him or her (I don't know).
But I don't think this will happen to u all this way & by the way i am an indian & english is my secondary language & my primary language is Hindi & It is my privilege that we Indians are smart enough to understand & read ur english language with some little mistakes but u people are not able to read my nation's any local language nor my nation's national language i.e hindi. or Devnagri lipi.
Let me be the first to congratulate you on your command of English, which could use a little fine-tuning, but is otherwise clear. So far I think I understand you perfectly, which is what matters. I also think it is clear that Indians have long ago established themselves as models for excellence in learning and discipline, among many other attributes. If I had to pick the things that bother me about India, it would be the 3 M's: missiles, misogyny and misery. I will be the first to complain that my own country has the same faults, and more, and these are only different in degree. All that is left for us to do next, is to agree on all the things we hate. Then we'll get along fine and help each other out the best we can. I think that pretty well describes the status quo among most people that are able to reach across the world as we are doing here.
Now, with all the diplomacy aside, let me present my reasons for disputing you. It is true that Britain colonized India, interfered with its internal affairs, killed people, blew things up, and then pulled out, leaving behind railroads, parliamentary procedure, hospitals, academies and English.
But they also left behind their Anglican religion. Whether you were exposed to Christianity on account of the British, or as a consequence of earlier Christian (Catholic/Orthodox) evangelizing, you obviously believe in it. So far so good.
But your question makes no sense to me. Since I am not a Christian, and since I recognize that war is completely contradictory to the Commandment not to kill, I find Christianity to be a huge contradiction, even more than Judaism or Islam, since Christianity goes to great lengths to insist that people love their enemies, which forbids all war. And yet war continues among people of all religions. Perhaps the world is evolving away from the need to make war. It would seem so. But the contradiction remains.
But India is the mortal enemy of Pakistan. The hatred is so intense that it sparked those grisly massacres in Mumbai. Whether you are a Christian, Hindu, Muslim, Sikh, Buddhist, Jain, or any other denomination, you should tolerate all people, respect their rights to self-determination, and put aside all other differences. This would include establishing full equality, eliminating all the antiquated prejudices of the old caste system, and taking better care of the poor. Again, Westerners have the same (or similar) problems, so there are no saints here. We are in this together (ultimately).
So what's your point, really? That Christianity is less pure in a country that used a nuke versus a country with a very small percentage of Christians that has nukes, and uses them for leverage?
I don't see where this is going. I am very curious why you are so focused on the bombing of Japan, which was purely a military decision, and only after making a costly attempt to exhaust conventional tactics. Why are you not instead addressing the Holocaust, or other atrocities of this kind, which are the most reprehensible kinds of mass murder, because they are not justified by any military exigency, just the most basic, primal hatred and lust for blood. This more directly points to the commandments handed down in the Bible.
The rest of your question makes no sense to me. You seem to be asking us to put ourselves in the position of 5 year old, in a conversation between Jesus and God the Father, which is exceedingly hypothetical, and contrary to the atheist position that there is no God or Jesus, there is just us. We could solve all the rationalizations used to start wars by simply discarding religion, discarding the pretense that one people is greater than another, and simply living by the treaties and laws we already have established, to prevent any future wars.
Obviously that is a lofty ideal. But the way to inch closer to an ideal is to strive to live up to it. So my conclusion is: ditch religion and move forward with productive talks and treaties, and put away the stupid pretense (not you, countries) that lead to war.