Do people of the world always remember nazis were bad guys? No. They quite often so not.
I think that the world will not always remember, unless it makes it its rightful duty to always remember.
The US should be known as similar to Nazi Germany; in fact, far, far worse when considering scale, longevity, and its global genocidal reach. But that won't come easily. Especially as its influence dies down- and hopefully, if it dissolves altogether in due time- I see that as a global responsibility.
I’m from the “global south” and things have always been very split here. I remember in school and college there were always people who would talk about the US as the “great Satan”. But just as many people were ameriboos. I don’t feel things have changed much. The ameriboos are just more outwardly fascistic now.