While you are right in general, Fullmetal Alchemist isn’t an example of glorifying Nazi Germany. The country is a military dictatorship, they committed a genocide while conquering a neighbouring region and are not portrayed as the good guys. The war and genocide was shown to have long lasting bad effects both on the victims and the perpetrating soldiers. And the leadership is literally working for the big bad.

Just wanted to clarify, as this is one of the few examples where they play the Nazi card straight instead of going: “nice uniform and marching music”.