In both competitive multiplayer and Zombies mode, the swastika was left out. In many ways, Sledgehammer has ditched historical accuracy and created something that they view as accessible to everyone, with the horrors of that specific war---and the Nazi's fascist, racist regime---left out altogether. It's an interesting approach, and a tricky decision to make. But Condrey says there were several deciding factors.
"First, these are visceral experiences that are as much social and competitive as they are historical depictions of the conflict, he says. "Including Nazi symbols wouldn’t bring honor, nor be appropriate, without the rich history of a WW2 story to ground their context in Multiplayer."
Condrey also notes that the online multiplayer experiences are "shared, global ones, so we needed to adhere to local laws and regulations, while ensuring that everyone has the same level and identical playing field." In other words, German gamers wouldn't see a different game in multiplayer than the rest of the world, which makes sense.