The nazi party killed 14 million people and it was an organization not a country

"the President of the United States nuked China but it was just him not America"

Nazi Germany was a country that briefly existed beginning in 1933 and ending in 1945 I'd say it was a full blown country

The nazi didn't just invade Germany. There were a lot of other countries they held

Yes
But they were definitely a country and not just an organization

They still had borders to Germany to separate it from other conquered countries. Germany was kinda the Motherland of the Nazi forces

and it was more recent