Did they have wars? Yup. Did they have wars of aggression against their neighbors? not really
They were probably right. Now, putting aside the bomb wasn't available before VE Day, let's look at propaganda at the time.
Propaganda against Germany separated "Nazis" and "Good Germans". There were a lot of good Germans, the US government told my German-born grandparents who still had family in the "Old Country". We just had a problem with the Nazis.
The Japanese, on the other hand, were portrayed as sub-human monsters.
Actually, the nukes weren't much of a factor at all. The deciding factor was the entry of the USSR into the war.
Now Japan was facing two or three new potential fronts against a battle-hardened army with a much more vicious attitude on how to treat enemy civilians.