Well that does not surprise me, the minecraft creator is also a nazi.

But i did find this which I feel like is a funny but not realistic excuse:

"I'm a Call of Duty player right... it's all about World War Two and how you play and I'm a big fan of that. I've bought memorabilia from Churchill, from Stalin, from Hitler."

But Mr Dotcom denied his ownership of the book meant he subscribed to Hitler's Nazi ideology.

"Well, let me make it absolutely clear, I'm not buying into the Nazi ideology. I'm totally against what the Nazis did."

"I did buy a cigar holder of Churchill and I did buy a pen of Stalin."

"I'm not a nazi, just a gamer who's into WW2 history" is an all time classic excuse