Sgt. Striker makes a pretty good case showing just how much the Germans have changed since 1939. He also mentions that Poland, rather than Germany, is now the center of martial prowess in continental Europe these days.

Here's Europe just before World War I (1914). The militaristic part of Germany was called Prussia.  Prussia is on the far east side of Germany there.

But after two world wars, Germany was split in two:

Now, if you look closely, you can see that East Germany doesn't really go that East. A good chunk of Prussia is now part of, you guessed it, Poland.

The question is, is Germany pacifistic because:

[A] The destruction caused by World War II and having been on the losing side of two world wars changed the culture?

[B] The culturally most militaristic part of Germany is no longer part of Germany?

[C] Two world wars killed off millions of Germans. The more militaristic you tended to be, the more likely you were to be killed in one of the two world wars. Hence, a form of natural selection.

Obviously, there is some "a bit of all 3" but it's probably not all 3 in equal parts. Which one is it mostly of?