Anime in general has this weird obession with the Nazis. Look at JoJo's part 2 or Hellsing Ultimate for example.
Yep this also.
Not sure how far you are but I would say Ains is the bad guy of the story. So much stuff that happens is clearly evil.
Now the fact Ains is the protagonist I can understand your point because I hate the Nazi asthetic fetishism in anime too and I wish it would stop.
Yep this also.