It is never up to Americans to go to war or not
It was always up to American politicians
I'm not sure if you know how that reads, are you saying that Americans aren't responsible for anything and the politicians are in charge of everything? If so that makes America sound either like the old Soviet Union or something like Fascist Spain etc which I don't think you meant? Americans vote for the politicians so if there's blame (or credit) the voters have to take it not just the politicians.