What is your view on World War 2?

Okay, so I am currently doing an assignment based on WW2, I am focusing on the PoWs under the Japanese.
But it made me curious: from what you know of the war, what are your thoughts on some of the specific things that happened?
i.e. What do you think about the Japanese involvement of the war, were they the attacker or the victim?

Please, I don’t want people saying that others are wrong in a rude way, I just want to know your opinion, express yourself, don’t be shy