I've been seeing more and more on how Hitler was actually demonized by the Bolsheviks though. And they had interests in getting him out of the way. So I don't know about the "official" reasons for WWII anymore.
Germany didn't have a plan to take over the world though, just Europe, and that again was more than likely just propaganda to get North America involved.
My grandfather fought in Germany for the US. He was in the US Army. So it's cool you have a brave relative like that.
Japan was pretty aggressive towards China(most of Asia) and I can understand why. The events leading up to Japan's involvement in WWII are eye openers. Japan didn't deserve a nuke, but I get that in the "official story" mindset it was necessary. And we saved many of our own from dying because of it. Japan is a great ally now tough and their tech would be beneficial to a new group. Plus it would be awesome to see NA, SA, and Japan(maybe even Australia) team up against the UN and its allies. :)