The Japanese believed they were fighting for the right reason. I know it is impossible for a yankie-doodle like yourself to step outside of your own super-inflated National Ego and see that other people may be fighting for something they believe to be good, but trust me it does happen.
If you honestly believe that America played no part in getting itself involved in the war, then your ability to observe only the "facts" that you want to believe, and ignore those you don't has reached new levels, and truly astounds me.
Dropping atomic bombs in areas attempting to maximise civilian fatalities is not an act of war, that is an act of evil. Using your logic it is like saying Stalin was right to kill millions of his people because they "didn't surrender and do what he said." The only people in history who think the Americans done the right thing against the Japanese, or anyone for that matter, is themselves. There is a reason you are the most hated and despised nation in the world and there is a reason things like 9/11 happen. As sick and twisted at terrorists are, they don't kill people for the fun of it.
"US citizens
seem to have this undying hate towards Japanese because of Pearl Harbour"
What part of that is so incomprehensible to you, that you have to assume I am making stuff up because you can't get your head around it?
Warn the Japanese to surrender

pfft if that is what you are taught in school then great, it's nice to see your government is trying to resolve the financial situation by "making thick sh*t even thicker."
Let me put this into perspective for you. roughly 500,000 American soldiers were killed in world war 2. 1,700 civilians were killed. Japan had over 1 million civilian deaths, the vast majority coming from American bombing. Japan had more civilians killed by America, than America lost in total from the entire war, including Germany.
Don't you even dare try to tell me, when you have no idea of the real horrors of what happened, that America saved more lives than it took.