Most people have a surface understanding of WW2 based on a "good guys" and "bad guys" mentality. The truth is there is so many more grey areas. The Japanese didn't suddenly turn up in the sky over Pearl Harbour one day in an unprovoked attack, there were months and years of political shenanigans that led up to it. But most people are not interested in learning about that, they want a nice simple good guy / bad guy narrative that is easy to digest.